MS NOW

Rubio calls Clinton a ‘liar,’ but he can’t back up the attack

If a national candidate goes after a rival with the word "liar," he'd better be able to back it up — and in this case, Marco Rubio can't.

Sen. Marco Rubio
Sen. Marco Rubio, R-Fla., heads to the Senate floor for a vote on July 9, 2014CQ Roll Call

Steve Benen is a producer for "The Rachel Maddow Show," the editor of MaddowBlog and an MS NOW political contributor. He's also the bestselling author of "Ministry of Truth: Democracy, Reality, and the Republicans' War on the Recent Past."