FILE - In this Jan. 24, 2012 file photo, President Barack Obama greets, from second from left, Sen. Daniel Inouye, D-Hawaii, Sen. Patrick Leahy, D-Vt., Sen. Scott Brown, R-Mass., and Sen. John Kerry, D-Mass., on Capitol Hill in Washington, after delivering his State of the Union address. While many Republican lawmakers have used Obama as the ultimate campaign foil, Brown has touted his bipartisanship as a key asset in his re-election bid. (AP Photo/Evan Vucci, File)