Gingrich Calls Romney A "Liar"

Tuesday morning on CBS's "Early Show" with Norah O'Donnell and Bob Schieffer.

GINGRICH: "Let's be clear. Which part of what I said to you was false? Why is it if I'm candid in person, and I'm willing to be honest in person, that's shocking? His PAC buys millions of dollars in ads to say things that are false, that's somehow a part of how Washington plays the game?"