GOP candidate Gingrich drops out of Republican presidential race

Former US House Speaker and Republican presidential candidate Newt Gingrich (L) makes a concession speech as his wife Callista listens, officially dropping out of the GOP race, May 2, 2012, in Arlington, Virginia. Gingrich stopped short of endorsing presumptive nominee Mitt Romney, but said he would continue campaigning for Republican candidates and values in local, state and national elections. UPI/Mike Theiler