Mitt Romney’s visit to The Tonight Show featured a little joke about his potential candidacy:

Speculation has swirled over whether Republican former Massachusetts Gov. Mitt Romney will run for president in 2012, and in a late night television appearance Wednesday he said it will be clear when and if he’s throwing his hat in the ring.

“If you ever see me sign up for a gig on Fox News, it’ll be a clear indication that I’ve decided to run for president,” Romney joked on “The Tonight Show with Jay Leno,” a reference to the five potential 2012 candidates that appear on the network. “That’s not in the cards anytime soon, thanks.”

The interview also saw Romney taking a little jab at his strongest potential rival, Sarah Palin, and Palin’s little tiff with former first lady Barbara Bush:

He also called former President George H.W. Bush and former first lady Barbara Bush “remarkable people,” in reference to a recent interview on CNN’s “Larry King Live” where they spoke well of Romney. During the same interview Mrs. Bush said she thought Palin should “stay in Alaska.”

“(We’re) blessed with great first ladies, that Barbara Bush, she is one of a long line of terrific first ladies and Michelle Obama also,” Romney said. “Both of them could beat you arm wrestling, Barbara Bush, you don’t want to mess with her.”

The spat in question consisted of Barbara Bush saying Sarah Palin should “stay in Alaska” and then Palin responding by calling the Bush’s “blue bloods.”

Does mudslinging in frozen Alaska count as throwing rocks?