FILE - In this Jan. 19, 2012, file photo, then-Sen. Scott Brown, R-Mass., pumps his fist during his re-election campaign kick-off in Worcester, Mass., in this Jan. 19, 2012 file photo. Three years ago, Brown was a little-known Republican state senator from Massachusetts who shocked Democrats by winning a U.S. Senate seat. Now, having compiled a voting record more moderate than his tea party allies would have liked and losing his bid for a full term, Brown is considering whether to seize a second chance to return to the Senate in another special election. (AP Photo/Charles Krupa, File)