Mitt Romney Jay LenoAccording to NBC, this is Mitt Romney‘s first sit-down appearance on late-night TV since entering the 2012 presidential contest. Not since December 1st, 2010, has Romney been a guest on The Tonight Show — maybe because Jay Leno makes the GOP presidential primary frontrunner a regular target. This will be the perpetual candidate’s 4th visit to the Tonight Show couch, where his opponent President Obama last sat in October. Let’s see if Romney can top Obama’s 4.1 metered-market average rating — at the time Tonight Show‘s best number for a Tuesday telecast in a year-and-a-half and 52% higher than the show’s season-to-date average.