Romney, Giuliani continue air war in Iowa

Mitt Romney and Rudy Giuliani are starting new radio ads in Iowa that try to press what their campaigns see as openings in the tightly fought caucus race.

Romney's ad, which begins airing Wednesday, brags about his support for a federal constitutional amendment defining marriage as between one man and one woman. It also reminds listeners that he was the first major candidate to condemn an Iowa judge's decision last month that allowed same-sex marriage.

"The court ruling in Iowa is just another example of an activist judge trying to find things in the Constitution that aren't there," Romney says in the spot. "As Republicans, we must oppose discrimination and defend traditional marriage: one man, one woman."

Giuliani's ad, meanwhile, tries to capitalize on the fight he picked with the antiwar group MoveOn.org, which is influential among Democrats, but anathema among Republicans.

After he excoriated the group for placing a newspaper ad last week questioning the honesty of General David H. Petraeus and placed an ad in reply, MoveOn.org's political action committee started a TV ad in Iowa this week accusing Giuliani of being AWOL from meetings of the Iraq Study Group.

In the radio ad that began airing today, the narrator says, "Why is MoveOn attacking Rudy Giuliani? Because he’s their worst nightmare. They know Rudy is a Republican who can beat the Democrats. And they know, no matter what they say, Rudy will never, ever back down."