"You lied when you say you weren't walked out of the Fox News Channel - that's a lie," Hannity charged.

"It isn't," Franken insisted, saying they merely had a "screaming match" over whether Rush Limbaugh had ever called Chelsea Clinton "the White House dog."

The conservative host said he had four witnesses who would testify under oath about the details of the incident. "I'll bring them to you and you can put them on Air America," Hannity pledged.

Asked if he would correct the record in his next book if the witnesses confirm Hannity's version, Franken replied: "Absolutely. If my recollection is wrong, I'll admit it."

Franken acknowledged apologizing to Hannity once before, admitting that "my fuse blew" during the earlier encounter and he called Hannity to apologize afterward.

Editor's note: