Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 24: Central American asylum seekers wait for buses to take them to Tijuana on the U.S.-Mexico border on April 24, 2018 in Hermosillo, Mexico. More than 300 immigrants, the remnants of a caravan of Central Americans that began almost a month before set out on the last leg of their journey north in Mexico. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 23: Central American immigrants, part of an immigrant "caravan," line up to eat before staging a protest against U.S. President Donald Trump on April 23, 2018 in Hermosillo, Mexico. They demonstrated against Trump's tweets calling for U.S. Homeland Security to stop them from crossing the border into the United States to request political asylum. More than 500 immigrants, the remnants of a caravan of Central Americans that began their journey north almost a month ago, is within days of reaching their destination in Tijuana, which borders San Diego. Traveling together, many atop freight trains known as the "beast," or in buses, they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. President Trump sent National Guard troops to U.S. border regions in response to the caravan weeks before, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 24: Central American asylum seekers wait for buses to take them to Tijuana on the U.S.-Mexico border on April 24, 2018 in Hermosillo, Mexico. More than 300 immigrants, the remnants of a caravan of Central Americans that began almost a month before set out on the last leg of their journey north in Mexico. President Trump sent National Guard troops to U.S. border regions in response to the caravan weeks before, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 23: Central American asylum seekers wait for buses to take them to their next destination on thier "caravan" north to the US-Mexico border on April 23, 2018 in Hermosillo, Mexico. More than 500 immigrants, the remnants of a caravan of Central Americans that began almost a month ago, is within days of reaching their destination in Tijuana, which borders San Diego. Traveling together, on buses or atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. President Trump sent National Guard troops to U.S. border regions in response to the caravan weeks before, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 23: Central American immigrants, part of an immigrant "caravan," march in protest against U.S. President Donald Trump on April 23, 2018 in Hermosillo, Mexico. They demonstrated against Trump's morning tweets calling for U.S. Homeland Security to stop them from crossing the border into the United States to request political asylum. More than 500 immigrants, the remnants of a caravan of Central Americans that began their journey north almost a month ago, is within days of reaching their destination in Tijuana, which borders San Diego. Traveling together, many atop freight trains known as the "beast," or in buses, they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. President Trump sent National Guard troops to U.S. border regions in response to the caravan weeks before, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 23: Central American immigrants, part of an immigrant "caravan," line up to eat at a shelter before staging a protest against U.S. President Donald Trump on April 23, 2018 in Hermosillo, Mexico. They demonstrated against Trump's tweets calling for U.S. Homeland Security to stop them from crossing the border into the United States to request political asylum. More than 500 immigrants, the remnants of a caravan of Central Americans that began their journey north almost a month ago, is within days of reaching their destination in Tijuana, which borders San Diego. Traveling together, many atop freight trains known as the "beast," or in buses, they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. President Trump sent National Guard troops to U.S. border regions in response to the caravan weeks before, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 23: Central American immigrants, part of an immigrant "caravan," eat before staging a protest against U.S. President Donald Trump on April 23, 2018 in Hermosillo, Mexico. They demonstrated against Trump's tweets calling for U.S. Homeland Security to stop them from crossing the border into the United States to request political asylum. More than 500 immigrants, the remnants of a caravan of Central Americans that began their journey north almost a month ago, is within days of reaching their destination in Tijuana, which borders San Diego. Traveling together, many atop freight trains known as the "beast," or in buses, they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. President Trump sent National Guard troops to U.S. border regions in response to the caravan weeks before, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 23: Central American immigrants, part of an immigrant "caravan," march in protest against U.S. President Donald Trump on April 23, 2018 in Hermosillo, Mexico. They demonstrated against Trump's morning tweets calling for U.S. Homeland Security to stop them from crossing the border into the United States to request political asylum. More than 500 immigrants, the remnants of a caravan of Central Americans that began almost a month ago, is within days of reaching their destination in Tijuana, which borders San Diego. Traveling together, many atop freight trains known as the "beast," or in buses, they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. President Trump sent National Guard troops to U.S. border regions in response to the caravan weeks before, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 23: Central American immigrants, part of an immigrant "caravan," march in protest against U.S. President Donald Trump on April 23, 2018 in Hermosillo, Mexico. They demonstrated against Trump's morning tweets calling for U.S. Homeland Security to stop them from crossing the border into the United States to request political asylum. More than 500 immigrants, the remnants of a caravan of Central Americans that began their journey north almost a month ago, is within days of reaching their destination in Tijuana, which borders San Diego. Traveling together, many atop freight trains known as the "beast," or in buses, they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. President Trump sent National Guard troops to U.S. border regions in response to the caravan weeks before, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 23: Central American immigrants, part of an immigrant "caravan," march in protest against U.S. President Donald Trump on April 23, 2018 in Hermosillo, Mexico. They demonstrated against Trump's morning tweets calling for U.S. Homeland Security to stop them from crossing the border into the United States to request political asylum. More than 500 immigrants, the remnants of a caravan of Central Americans that began their journey north almost a month ago, is within days of reaching their destination in Tijuana, which borders San Diego. Traveling together, many atop freight trains known as the "beast," or in buses, they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. President Trump sent National Guard troops to U.S. border regions in response to the caravan weeks before, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 23: Central American immigrants, part of an immigrant "caravan," march in protest against U.S. President Donald Trump on April 23, 2018 in Hermosillo, Mexico. They demonstrated against Trump's morning tweets calling for U.S. Homeland Security to stop them from crossing the border into the United States to request political asylum. More than 500 immigrants, the remnants of a caravan of Central Americans that began their journey north almost a month ago, is within days of reaching their destination in Tijuana, which borders San Diego. Traveling together, many atop freight trains known as the "beast," or in buses, they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. President Trump sent National Guard troops to U.S. border regions in response to the caravan weeks before, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 23: Central American immigrants, part of an immigrant "caravan," stand in solidarity during a protest march against U.S. President Donald Trump on April 23, 2018 in Hermosillo, Mexico. They demonstrated against Trump's morning tweets calling for U.S. Homeland Security to stop them from crossing the border into the United States. More than 500 immigrants, the remnants of a caravan of mostly Central Americans that began almost a month ago, is within days of reaching their destination in Tijuana, which borders San Diego. Traveling together, many atop freight trains known as the "beast," or in buses, they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. President Trump sent National Guard troops to U.S. border regions in response to the caravan weeks before, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 23: Central American immigrants, part of an immigrant "caravan," stand in solidarity during a protest march against U.S. President Donald Trump on April 23, 2018 in Hermosillo, Mexico. They demonstrated against Trump's morning tweets calling for U.S. Homeland Security to stop them from crossing the border into the United States. More than 500 immigrants, the remnants of a caravan of mostly Central Americans that began almost a month ago, is within days of reaching their destination in Tijuana, which borders San Diego. Traveling together, many atop freight trains known as the "beast," or in buses, they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. President Trump sent National Guard troops to U.S. border regions in response to the caravan weeks before, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: Honduran immigrants rest at a shelter while on their journey to the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan of mostly Central Americans that began almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: Immigrants watch a movie while staying at a shelter on their journey towards the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan of mostly Central Americans that began almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: Immigrants sort through donated clothing during a pause on their journey towards the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan of mostly Central Americans that began almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: Mexican Red Cross workers carry a sick immigrant to an ambulance at a shelter on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan of mostly Central Americans that began almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: Immigrants watch a movie while staying at a shelter on their journey towards the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan of mostly Central Americans that began almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: Immigrants arrive at a rest stop to receive medical attention while on their journey towards the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan that crossed into Mexico almost a month ago, is within days of reaching the border. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: Immigrants arrive to a rest stop to get medical attention while on their journey towards the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan that crossed into Mexico almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Red Cross, private citizens and government officials. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: Immigrants get medical attention and perscription drugs at a rest stop on their journey towards the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan that crossed into Mexico almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Red Cross, private citizens and government officials. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: Immigrants wait for medical attention at a rest stop on their journey towards the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan that crossed into Mexico almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Red Cross, private citizens and government officials. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: Immigrants wait to receive medical attention at a rest stop while on their journey towards the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan that crossed into Mexico almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Red Cross, private citizens and government officials. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: An immigrant baby receives a gift as her mother receives medical attention at a rest stop on their journey towards the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan that crossed into Mexico almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Mexican Red Cross, private citizens and government officials. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: An immigrant mother gives medicine to her sick child after a night's rest on an outdoor basketball court during a pause on their journey towards the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan that crossed into Mexico almost a month ago, is within days of reaching the border.  (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 21: Immigrants, most of them from Central America, wait for transport to a soup kitchen after traveling by freight train on their journey towards the U.S.-Mexico border on April 21, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan that crossed into Mexico almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Red Cross, private citizens and even the Mexican government. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 21: Immigrants, most of them from Central America, arrive by freight train for a rest stop on their journey to the U.S.-Mexico border on April 21, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan that crossed into Mexico almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Red Cross, private citizens and even the Mexican government. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: Immigrants wait to receive medical attention at a rest stop while on their journey towards the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan that crossed into Mexico almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Red Cross, private citizens and government officials. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore Migrant caravan approaches US-Mexico border HERMOSILLO, MEXICO - APRIL 22: Immigrants begin to awake after a night's rest on an outdoor basketball court during a pause on their journey towards the U.S.-Mexico border on April 22, 2018 in Hermosillo, Mexico. Some 600 immigrants, part of a caravan that crossed into Mexico almost a month ago, is within days of reaching the border. Traveling together, many atop freight trains known as the "beast," they have sought safety in numbers on the dangerous journey. Along the way, they have received an outpouring of help from local charities, the Red Cross, private citizens and even the Mexican government. U.S. President Donald Trump sent National Guard troops to border regions in response to the caravan, although many in the group are families who plan to seek political asylum the U.S. (Photo by John Moore/Getty Images)Photo by: John Moore