Jay vs. Dave

DUELING REPUBLICANS: Jay Leno’s return to late night, which got a helluva lead-in from the Winter Olympics, begins tonight with Sarah Palin as the primary lure—prompting David Letterman’s talent bookers to reel in Mitt Romney. During the course of his first week back, Leno will have Lindsey Vonn, Adam Lambert and the cast of Jersey Shore on the couch, while Dave’s crew has poached NBC for Jerry Seinfeld and Tom Brokaw, both of whom are booked for Wednesday. (3/1a)