As his opponents seem to stumble day after day, the former Massachusetts governor avoids mishap in part by doing just a few public events a week. Behind the scenes, he’s wooing endorsements and raising a good bit of cash.
Source: http://www.npr.org/2011/11/18/142511968/wheres-mitt-romney-running-out-the-clock?ft=1&f=1014
Patrick Leahy Lamar Alexander Barbara Boxer Ben Nelson Bernie Sanders Max Baucus Mitch McConnell Joe Lieberman