Super Tuesday

A voter in Montpelier, Vt., casts his ballot for the Republican presidential primary Tuesday, March 6, 2012. At stake in the 10 states that cast ballots during what's known as Super Tuesday are 419 delegates to the Republican party's August national convention, by far the most of any day in the primary season.

A campaign sign is seen along the roadside Tuesday, March 6, 2012 in Sharon, Vt. Vermonters will cast their votes in the Republican presidential primary on Tuesday.

A woman walks past a sign set outside a polling station during the Super Tuesday Republican primary elections in Cambridge, Massaschusetts, March 6, 2012. Republican voters make their way to the polls in the Super Tuesday primary elections in 10 states and 419 delegates at stake.

AP Photo/Atlanta Journal & Constitution, Vino Wong

Bradley Williams, 3, leans over to take a look as his dad, Doug, casts his vote during Super Tuesday at the Spalding Drive Elementary School in Sandy Springs, Ga., Tuesday, March 6, 2012. Republican Presidential candidate and former House Speaker Newt Gingrich was favored to win in Georgia on Tuesday, but his rivals have spent time and resources in the state, hoping to grab a share of the state's 76 delegates.

Voters cast their ballots at a polling place during Super Tuesday voting on March 6, 2012 in Carrollton, Ohio. The two top Republican presidential candidates, Mitt Romney and Rick Santorum, are running neck and neck in the state.

Vicki Cronis-Nohe, AP Photo/The Virginian-Pilot

Voters in the King's Grant precinct cast their ballots for the Republican primary in silence Tuesday, March 6, 2012, at St. Nicholas Catholic Church on Little Neck Road in Virginia Beach, Va. Voters trickled in on Tuesday at a much slower rate than usual, according to Assistant Chief Election Officer Cecelia Clement.

Voters cast their ballots in the Republican presidential primary, as children make their way through the hall of an elementary school, on Tuesday, March 6, 2012, in Johns Creek, Ga.

Poll workers look on at a polling place during Super Tuesday voting on March 6, 2012 in Youngstown, Ohio. The two top Republican presidential candidates, Mitt Romney and Rick Santorum, are running neck and neck in the state.

Republican presidential candidate, former Massachusetts Gov. Mitt Romney (L) walks with his wife Ann Romney after voting at the Beech Street Senior Center on March 6, 2012 in Belmont, Massachusetts. Mitt Romney cast his ballot for the Super Tuesday primary in Massachusetts before attending his Super Tuesday gathering.

Republican presidential candidate, former Massachusetts Gov. Mitt Romney (R) casts his ballot during Super Tuesday voting at Beech Street Senior Center on March 6, 2012 in Belmont, Massachusetts. With over 400 delegates up for grabs voters in ten states went to the polls on Super Tuesday in the continuing fight for the Republican presidential nomination.

Republican presidential candidate, former House Speaker Newt Gingrich speaks in Duluth, Ga., Tuesday, March 6, 2012.

Republican presidential candidate, former Speaker of the House Newt Gingrich addresses the Gwinnett Chamber of Commerce during a campaign stop March 6, 2012 in Duluth, Georgia. Ten states, including Georgia, are holding caucuses and primaries today for voters to pick their choices for the Republican presidential nominee.

Supporters of Newt Gingrich cheer during a rally as FOX news projects Gingrich winning the Georgia Republican primary March 6, 2012 in Atlanta, Georgia. Republican presidential candidate Gingrich, a former Speaker of the US House of Represenatives, hoping a big win in his home state of Georgia on Super Tuesday, could serve as a launchpad for a southern sweep that could get him right back into the Republican presidential race.

Supporters of Republican presidential candidate, former Massachusetts Gov. Mitt Romney celebrate during a Super Tuesday night gathering on March 6, 2012 in Boston, Massachusetts. Mitt Romney celebrated Super Tuesday wins in Massachusetts and Virginia. Ten states, including Georgia, hold caucuses and primaries today for voters to pick their choices for the Republican presidential nominee.

Republican presidential candidate, former Massachusetts Gov. Mitt Romney, greets supporters at his Super Tuesday primary party in Boston, Tuesday, March 6, 2012.

Republican presidential candidate, former Speaker of the House Newt Gingrich and his wife Callista Gingrich wave after being declared the winner of the primary in Georgia during the election night rally at the Renaissance Atlanta Waverly Hotel on March 6, 2012 in Atlanta, Georgia. With over 400 delegates up for grabs voters in ten states went to the polls on Super Tuesday in the continuing fight for the Republican presidential nomination.

Republican presidential candidate former House Speaker Newt Gingrich and his wife Callista wave to a crowd gathered for a rally after he won the Georgia primary Tuesday, March 6, 2012 in Atlanta.

Republican presidential candidate, former Massachusetts Gov. Mitt Romney, and his wife Ann greet supporters as they arrive at their Super Tuesday primary night rally in Boston, Tuesday, March 6, 2012.

Republican presidential hopeful Mitt Romney and his wife Ann attend a Super Tuesday Republican primary elections evening in Boston, Massaschusetts, March 6, 2012. Republican voters made their way to the polls in the Super Tuesday primary elections in 10 states and 437 delegates at stake.

AP Photo/The Idaho Statesman, Joe Jaszewski

Ada County Republicans caucus at Taco Bell Arena on the campus of Boise State University in Boise, Idaho, on Tuesday, March 6, 2012. Idaho, even with its rich Republican tradition and 32 delegates, has traditionally been an afterthought to candidates vying for the presidential nomination. But GOP officials changed the state's schedule last year, opting instead to swap out a May primary for a caucus on March 6, putting Idaho in the same group as nine other states with Super Tuesday balloting.

Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, left, and his wife, Karen, right, arrive at his election night rally at Steubenville High School, Tuesday, March 6, 2012, in Steubenville, Ohio.

Republican presidential candidate, former Pennsylvania Sen. Rick Santorum takes the stage at his election night party at Steubenville High School, Tuesday, March 6, 2012, in Steubenville, Ohio.

Republican presidential candidate, former Pennsylvania Sen. Rick Santorum speaks at his election night rally at Steubenville High School, Tuesday, March 6, 2012, in Steubenville, Ohio.

Republican presidential candidate Rep. Ron Paul, R-Texas, takes in the applause of the crowd as he address a crowd during the North Dakota caucus Tuesday, March 6, 2012, in Fargo, N.D.

Republican presidential candidate Rep. Ron Paul, R-Texas, addresses the crowd during the North Dakota caucus Tuesday, March 6, 2012, in Fargo, N.D.