WASHINGTON–Jay Leno gets back the Tonight Show this week and hosts Sarah Palin on his Tuesday show–with the Monday debut featuring Vancouver Olympic greats. To counter, David Letterman on Tuesday booked Mitt Romney. I don’t think it’s much of a match: Palin will bring Leno more viewers than Romney. Don’t take this as a prediction of who will be the 2012 GOP presidential nominee, but, rather, who people want to hear from next Tuesday. Ted Johnson, over at Variety’s Wilshire and Washington blog notes how Leno and Letterman are booking political figures for their shows.