Ensign's decision will touch off a series of changes to Nevada's political landscape. It places a newly elected Republican Representative in the driver's seat for a Senate promotion. It cracks the door ajar -- ever so slightly -- for a possible Democratic pickup. It provides the previously defeated Sharron Angle with a possible path to Washington, D.C. Jon Ralston is already tweeting up a storm, and why not? His studio is likely to be as popular a destination in 2012 as it was in 2010.