Leno is back as host of NBC's late-night show at 11:35 p.m. EST Monday, March 1. Jay Leno made news when he announced that Sarah Palin will be among his high-profile guests when he returns to The Tonight Show next week. Now David Letterman's lineup for next week pits Mitt Romney against Sarah Palin on Tuesday night -- bad news for Letterman and Romney. As we have seen in the past year every single event or guest appearance by Sarah Palin brings in a huge audience where as Romney cannot scrap together 200 people . Each time she appears on...