Republican presidential candidate Mitt Romney talks with Jay Leno during his appearance on NBC's "The Tonight Show" in Burbank, Calif., on Tuesday, March 27, 2012. (AP Photo/NBC, Paul Drinkwater)

Photo by: Paul Drinkwater

Republican presidential candidate Mitt Romney talks with Jay Leno during his appearance on NBC's "The Tonight Show" in Burbank, Calif., on Tuesday, March 27, 2012. (AP Photo/NBC, Paul Drinkwater)