Biden, Giuliani camps exchange barbs

The best one-liner from Tuesday night's Democratic presidential debate has sparked an entertaining war of words between Joe Biden and Republican Rudy Giuliani.

Biden, a senator from Delaware, repeatedly said that the former New York mayor was unqualified to be president, then punctuated his assertion: "There's only three things he mentions in a sentence -- a noun, and a verb, and 9/11. I mean there's nothing else."

That prompted Katie Levinson, Giuliani's communications director, to dredge up accusations that Biden plagiarized speeches, which helped sink his 1988 presidential bid.

In her statement, she followed that up with this zinger: "Senator Biden certainly falls in to the bucket of those on the stage tonight who have never had executive experience and have never run anything. Wait, I take that back, Senator Biden has never run anything but his mouth. Such a desperate attack from Senator Biden is to be expected considering I -- Katie Levinson –-have a better chance of becoming President than he does."

Biden communications director Larry Rasky responded by repeating complaints from New York police officers and firefighters that Giuliani didn't adequately support them.

"We are well aware," Rasky added in a statement, "that former Mayor Giuliani will attempt to drag this race into the mud where the Republicans like to wage their campaigns."