On Tuesday, Chris Matthews and MSNBC panelists discussed the question of whether some conservative radio hosts--particularly Mark Levin and Michael Savage--motivate alleged murderers like Jared Loughner by fanning the flames of "heated" political rhetoric. "Every time you listen to [the radio hosts, they] are furious, furious at the left with anger that's just builds and builds in their voice and by the time they go to commercial, they're just in some rage, every night, with ugly talk. Ugly sounding talk. And it never changes," said Matthews. Needless to say, this association didn't sit well with Levin.

In a blistering retort on his nationally syndicated radio show, Mark Levin fired back at Matthew's and threw down a potential legal gauntlet. "$100,000 on the table if Chris Matthews can find anywhere where Mark Levin has urged the murder of people who have different political viewpoints. That is, the murder of politicians...not talking about terrorists I believe they should be killed and as fast as possible and as many as possible. But I mean,where I have said 'Go out there and kill XYZ!' 'Go out there and and Kill ABC!' I challenge him right now..."

He then goes on to name Chris Matthews, Ed Schultz, Keith Olbermann, Rachel Maddow, Joe Scarborough and "little weasel" David Frum. "Test me," he challenges them--to see if he will sue or not. "Anybody who accuses me of inciting mass murder in Tuscon, Arizona is going to be sued. Period," declares Levin. A longer clip of the radio broadcast is below along with the original Chris Matthews MSNBC clip: