Former Speaker of the House Newt Gingrich (L) and his wife, Callista walk together after he suspended his bid for the GOP presidential nomination in Arlington, Virginia, May 2, 2012. REUTERS/Larry Downing
U.S. Republican presidential candidate Newt Gingrich bows his head in prayer before speaking at First Redeemer Church while on a campaign tour in Cumming, Georgia, February 26, 2012. REUTERS/Tami Chappell
The lawyer behind the case that opened the door to U.S. "Super PACs" and more campaign cash now has one of his own. Thousands of U.S. dollars are seen here in this November 3, 2009 file photo at a Westminster, Colorado bank. REUTERS/Rick Wilking
Former presidential candidate and Pennsylvania Senator Rick Santorum is featured on a button by a supporter who also wore the politician's trademark vest in this January 14, 2012 file photo. REUTERS/Jason Reed
A new government report shines the spotlight again on New Jersey Gov. Chris Christie, see here at a presidential campaign event for Republican candidate Mitt Romney on December 30, 2011. REUTERS/Rick Wilking
Republican presidential hopeful Mitt Romney’s first television commercial attacking Barack Obama’s record hits the airwaves in New Hampshire on Tuesday — just in time to welcome the president on a visit to the early primary state.