City Councilman Carl DeMaio and Rep. Bob Filner wasted no time blasting each others ideas as the fight to become San Diego's next mayor kicked off the day after the primary election.

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On Tuesday night, DeMaio finished with 32 percent of the vote and Filner with 30 percent, setting the stage for a November showdown.

Both men appeared on 10News Midday Wednesday, and during the appearance, DeMaio criticized what he referred to as Filner's inability to control spending or debt.

"At some point, Mr. Filner, you have to pay for things, you have to have a plan that will actually convert ideas into action," said DeMaio.

Filner fired back, "My plan for the pension puts $550 million into the general fund without new taxes. I've challenged Mr. DeMaio in every debate to say how his does that. He never answers it."

The mayoral candidates don't agree on much, but they did agree they each need to capture the Nathan Fletcher and Bonnie Dumanis voters.

"I think most of those voters are going to go to me because I think they have an optimistic positive view of what we can do in the future," said Filner.

"Well, I think that's why they're going to be coming over to my camp because they know that I'm offering a positive vision for the future of our city," said DeMaio.

Political analyst Dr. Carl Luna said who will get the Fletcher and Dumanis voters isn't clear cut.

"Conventional wisdom holds that since Fletcher was a Republican, Bonnie Dumanis is a Republican, those votes will go to Carl DeMaio. I'm not so certain about that though," said Luna.

Luna told 10News it may rest on who moderates don't like.

"If independents have a choice between a very conservative Carl DeMaio or a liberal Democrat, Bob Filner, it may just come down to which guy annoys them the least," said Luna.

DeMaio and Filner did seem to annoy each other when blasting their different takes on pension reform.

"I'm not about to support a plan like his that would pay one credit card with another, take out more debt. That's part of the failed practices of the past," said DeMaio.

Filner replied, "You're not paying one debt with a credit card; you're refinancing."

Luna said their aggressive campaign styles will make the mayoral race a closer-than-usual matchup in November.

"A lot will have to do with the turnout, how much national money pours into the campaign," said Luna.

Each will have to reach out more to the middle without losing his base, Luna added.

"You have two candidates who have a very good sense of themselves, and when those two collide it's going to be a mayoral hurricane in the fall," said Luna.

Luna said the presidential race will most likely help Filner more than DeMaio by bringing out more Democrats who will vote for Barack Obama.