

A supporter of Republican vice presidential candidate Paul Ryan takes his photo as he works the rope line during a campaign event at The Villages in Lady Lake, Fla., Aug. 18, 2012. Scott Audette/Reuters
Children hold up letters spelling OBAMA, as seen from the media bus as President Obama's motorcade passes through Tama, Iowa, Aug. 14, 2012, during a three-day campaign bus tour through Iowa. Carolyn Kaster/AP
Workers listen to Republican presidential candidate and former Massachusetts Governor Mitt Romney speak during his Beallsville Coal campaign event at the American Energy Corporation in Beallsville, Ohio, Aug. 14, 2012. Shannon Stapleton/Reuters
Three-year-old Dean Call holds a sign as Republican presidential candidate Mitt Romney speaks during a campaign rally in Columbia, South Carolina, January 11, 2012. Brian Snyder/Reuters
An employee from Tom's Ice Cream Bowl listens as presidential candidate Mitt Romney speaks during a campaign stop at in Zanesville, Ohio, Aug. 14, 2012. Shannon Stapleton/Reuters
Republican presidential candidate, former House Speaker Newt Gingrich, poses for photos with the 'Pirates of the Spanish Maine' high school sorority before a rally on March 2, 2012, in Brunswick, Ga. Evan Vucci/AP
Robert Jewell who is a 'bicycle commuter' votes in the Illinois primary election at the Bourbonnais Municipal Center in Bourgonnais, Ill. Mike Voss/The Daily Journal/AP
Tea party supporter Susan Clark of California, dressed in colonial garb and face paint, protests against the Obama health-care legislation as the law's supporters and detractors rally on the sidewalk in front of the Supreme Court, during the third and final day of legal arguments over the Patient Protection and Affordable Care Act in Washington on March 28, 2012. Jonathan Ernst/Reuters
Wendy Caliguire arrives with her seven children to hear Republican presidential candidate, and former US Senator Rick Santorum, at a campaign rally at the US Space and Rocket Center in Huntsville, Alabama, March 8, 2012. Billy Weeks/Reuters
A supporter of Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, plays a trumpet at a campaign rally in Old San Juan, Puerto Rico, March 15, 2012. Ricardo Arduengo/AP
Jessica Lewis pins a Santorum button on her daughter, Ava, before the rally at John Boos and Co. in Effingham, Illinois, March 17, 2012. Sarah Conard/Reuters
People dance and wave flags before the start of a political rally with Republican presidential candidate, former Massachusetts Gov. Mitt Romney on March 16, 2012 in San Juan, Puerto Rico. Evan Vucci/AP
A young supporter starts to fade at Republican presidential candidate Mitt Romney's 'Super Tuesday' primary election night rally in Boston on March 6, 2012. Brian Snyder/Reuters
Sydney Walker holds a picture of Republican presidential candidate Rep. Ron Paul (R) of Texas before he spoke to a gathering of supporters at a rally on March 6, 2012 in Nampa, Idaho. Katherine Jones/The Idaho Statesman/AP
Sister Grace Anne Wills cheers with her rosary beads in her hand, as Republican presidential candidate Rick Santorum is being declared the winner in the Tennessee primary at his Super Tuesday primary election night rally in Steubenville, Ohio, March 6, 2012. Jim Young/Reuters
A small boy looks on as supporters cheer as Republican presidential candidate, former Massachusetts Gov. Mitt Romney spoke at a campaign rally at Skyline High School in Idaho Falls, Idaho, March 1, 2012. Gerald Herbert/AP
Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, stands below the Paul Bunyan and Babe, The Blue Ox statues, with Bill Batchhelder, during a campaign stop in Bemidji, Minn., Feb. 5, 2012. Bachhelder's company Bemidji Woolen Mills, manufactures the official, Santorum for president sweater vest. Charles Rex Arbogast/AP
A supporter of Republican presidential candidate and former Massachusetts Governor Mitt Romney, Colonel Oscar Poole, emerges from a portable toilet cubicle before a campaign rally in Ormond Beach, Florida January 22, 2012. Brian Snyder/Reuters
Grantlee Hoffman pulls at a sticker on his face during an event for Republican presidential candidate former House Speaker Newt Gingrich at Pinkerton Academy, January 8, 2012, in Derry, New Hampshire. Matt Rourke/AP
Izak the goat takes a bite of a sign held by Christine Davies, a US Republican presidential candidate and former Utah Governor Jon Huntsman supporter, after his campaign stop at Harvey's Bakery in Dover, New Hampshire January 9, 2012. Adam Hunger/Reuters
A supporter of Republican presidential candidate, former House Speaker Newt Gingrich sports campaign buttons during a Republican Jewish Coalition rally at the South County Civic Center, January 27, 2012, in Delray Beach, Fla. Matt Rourke/AP
Taylor, a pot belly pig, stands on display outside a rally for US Republican presidential candidate Rick Santorum in Blaine February 7, 2012. Eric Miller/Reuters
Mary Ann Taylor awaits Republican presidential candidate Rick Santorum at a campaign event aboard the U.S.S. Yorktown at Patriot's Point in Mount Pleasant, South Carolina January 17, 2012. Eric Thayer/Reuters
Members of The Democratic Women of Horry County, S.C., demolish the Republican 2012 Primary Debate sand sculpture, January 23, 2012, a feature from last week's televised Myrtle Beach, S.C. debate hosted by the South Carolina GOP and televised by Fox News. The organization secured the rights to demolish the sand sculpture. Steve Jessmore/The Sun News/AP
Sarah Heath, poses for a wedding photographer on her wedding day as Rick Santorum campaign volunteer Mike Rendino looks on at the podium before a primary elections party at the Citadel in Charleston, S.C., January 21, 2012. Rainier Ehrhardt/AP
Tea party supporter William Temple, of Brunswick, Ga., sits in the Des Moines Airport heading to go home after the Iowa caucus, January 4, 2012, in Des Moines, Iowa. Evan Vucci/AP
A supporter holds a sign before Republican presidential candidate Rick Santorum attends a campaign event in Hollis, New Hampshire January 7, 2012. Eric Thayer/Reuters
From left, Laura Fisher, and her children, Jacob, Dallin, Braden, Carson, and Garrett, pose for a photo with their t-shirts showing support for Republican presidential candidate, former Massachusetts Gov. Mitt Romney, prior to the start of a campaign rally, Feb. 3, 2012, in Elko, Nev. Ted S. Warren/AP
Cory Cunningham looks on from a tree as Republican presidential candidate former Pennsylvania Sen. Rick Santorum takes part in a TV interview near the Homestead Grocery and Deli, January 7, 2012, in Amherst, New Hampshire. Matt Rourke/AP
Newt Gingrich supporter Jared Bresee gestures at Genoa Town Hall during a Republican caucus in Genoa, Nevada February 4, 2012. Robert Galbraith/Reuters
Dee Hummel (r.), a supporter of Republican presidential candidate Newt Gingrich, cheers at a campaign rally at Stoney's Rockin' Country dance hall in Las Vegas February 3, 2012. At left is Hummel's daughter Cindy Buck. Rick Wilking/Reuters
A supporter of presidential candidate and former Pennsylvania Senator Rick Santorum wears a campaign button featuring his picture and wearing his trademark vest, at Santorum's Charleston campaign headquarters in South Carolina January 14, 2012. Jason Reed/Reuters
Supporter Lauren Ellis laughs as she holds her son Connor after republican presidential candidate US Rep. Ron Paul signed the back of her t-shirt during a whistle-stop at the Charleston International Airport in North Charleston, South Carolina January 20, 2012. Chris Keane/Reuters
Belinda Roberts, a supporter of US Republican presidential candidate and former Massachusetts Governor Mitt Romney attends a campaign rally in Charleston, South Carolina, January 19, 2012. Jim Young/Reuters
A supporter of Republican presidential candidate and former Massachusetts Governor Mitt Romney gathers at his South Carolina primary election night rally in Columbia, South Carolina, January 21, 2012. Jim Young/Reuters
Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks at a campaign rally in Mesa, Ariz., February 13, 2012. Gerald Herbert/AP