Photo: Charles Rex Arbogast / The Associated Press Image 1 of / 23 Caption Close

Image 2 of 23 Ron Paul visits with supporters Chris Hand and daughters Arianna Hand, 5, and Skiilyn Hand, 9, after speaking during a Campus Town Hall Meeting Friday night, March 23, 2012 at Southeastern Louisiana University. Ron Paul visits with supporters Chris Hand and daughters Arianna Hand, 5, and Skiilyn Hand, 9, after speaking during a Campus Town Hall Meeting Friday night, March 23, 2012 at Southeastern Louisiana University. Photo: Kerry Maloney / The Associated Press

Image 3 of 23 Ron Paul greets the crowd during a campaign stop in Dubuque, Iowa, Thursday, Dec. 22, 2011. Ron Paul greets the crowd during a campaign stop in Dubuque, Iowa, Thursday, Dec. 22, 2011. Photo: Charlie Riedel / The Associated Press

Image 4 of 23 Young supporters of Texas Republican Ron Paul wait for Paul to arrive for a town hall meeting in Denver, Tuesday, Jan. 31, 2012. Young supporters of Texas Republican Ron Paul wait for Paul to arrive for a town hall meeting in Denver, Tuesday, Jan. 31, 2012. Photo: Jack Dempsey / The Associated Press

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Image 6 of 23 Ron Paul jokes with a father and son during a campaign stop on Monday, Jan. 2, 2012, in Cedar Rapids, Iowa. Ron Paul jokes with a father and son during a campaign stop on Monday, Jan. 2, 2012, in Cedar Rapids, Iowa. Photo: Evan Vucci / The Associated Press

Image 7 of 23 Eisley Collins, 2, snacks next to a Ron Paul sign at a Republican watch party in Oklahoma City, Tuesday, March 6, 2012. Eisley Collins, 2, snacks next to a Ron Paul sign at a Republican watch party in Oklahoma City, Tuesday, March 6, 2012. Photo: Sue Ogrocki / The Associated Press

Image 8 of 23 Eisley Collins, 2, snacks next to a Ron Paul sign at a Republican watch party in Oklahoma City, Tuesday, March 6, 2012. Eisley Collins, 2, snacks next to a Ron Paul sign at a Republican watch party in Oklahoma City, Tuesday, March 6, 2012. Photo: Sue Ogrocki / The Associated Press

Image 9 of 23 Ron Paul poses for a photograph while campaigning at Sandy's Variety Store in Manchester, N.H., Tuesday Dec. 20, 2011. Ron Paul poses for a photograph while campaigning at Sandy's Variety Store in Manchester, N.H., Tuesday Dec. 20, 2011. Photo: Charles Krupa / The Associated Press

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Image 11 of 23 Sydney Walker, 4, holds a picture of Republican presidential candidate Ron Paul before he spoke at a rally on Tuesday, March 6, 2012 in Nampa, Idaho. Sydney Walker, 4, holds a picture of Republican presidential candidate Ron Paul before he spoke at a rally on Tuesday, March 6, 2012 in Nampa, Idaho. Photo: Katherine Jones / The Associated Press

Image 12 of 23 Members of the Peik family Kristen, 20; Katie, 18; Stephen, 13; Teresa and twin brother Alex, 10, listen to Ron Paul address a group of home-school supporters at the Lawrence Barn on the day before the state primary January 9, 2012 in Hollis, N.H. less Members of the Peik family Kristen, 20; Katie, 18; Stephen, 13; Teresa and twin brother Alex, 10, listen to Ron Paul address a group of home-school supporters at the Lawrence Barn on the day before the state primary ... more Photo: Chip Somodevilla / Getty Images

Image 13 of 23 Texas Republican Ron Paul greets voters at Washington state caucus meetings, Saturday, March, 3, 2012, in Puyallup, Wash. Texas Republican Ron Paul greets voters at Washington state caucus meetings, Saturday, March, 3, 2012, in Puyallup, Wash. Photo: Ted S. Warren / The Associated Press

Image 14 of 23 Republican presidential candidate Ron Paul poses for a photo with Alaine Olthafer-Lange and her 3-month-old daughter Heidi Lange during a campaign stop in Dubuque, Iowa, Thursday, Dec. 22, 2011. Republican presidential candidate Ron Paul poses for a photo with Alaine Olthafer-Lange and her 3-month-old daughter Heidi Lange during a campaign stop in Dubuque, Iowa, Thursday, Dec. 22, 2011. Photo: Charlie Riedel / The Associated Press

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Image 16 of 23 Ron Paul poses for a photo with supporter David Larsen and his step-son Zac, during a Washington state caucus meeting, Saturday, March, 3, 2012, in Puyallup, Wash. Ron Paul poses for a photo with supporter David Larsen and his step-son Zac, during a Washington state caucus meeting, Saturday, March, 3, 2012, in Puyallup, Wash. Photo: Ted S. Warren / The Associated Press

Image 17 of 23 Ron Paul took time to hold 7-month-old Brody Grant of Gainesville, Ga. at the Spartanburg Marriott at Renaissance Park on Tuesday, Jan. 17, 2012, in Spartanburg, S.C. Ron Paul took time to hold 7-month-old Brody Grant of Gainesville, Ga. at the Spartanburg Marriott at Renaissance Park on Tuesday, Jan. 17, 2012, in Spartanburg, S.C. Photo: Alex C. Hicks Jr. / The Associated Press

Image 18 of 23 Ron Paul shakes hands with Henry Nichols, 3, and Davis Nichols, 6, as Paul and his wife, Carol, greet people at Washington state caucus meetings, Saturday, March, 3, 2012, in Puyallup, Wash. Ron Paul shakes hands with Henry Nichols, 3, and Davis Nichols, 6, as Paul and his wife, Carol, greet people at Washington state caucus meetings, Saturday, March, 3, 2012, in Puyallup, Wash. Photo: Ted S. Warren / The Associated Press

Image 19 of 23 Republican presidential candidate Ron Paul poses for a photo with a boy at Coon Rapids Middle School in Coon Rapids, Minn., Tuesday, Feb. 7, 2012. Republican presidential candidate Ron Paul poses for a photo with a boy at Coon Rapids Middle School in Coon Rapids, Minn., Tuesday, Feb. 7, 2012. Photo: Jeff Wheeler / The Associated Press

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Image 21 of 23 Texas Congressman Ron Paul poses with supporters after his "Salute to Veterans" rally at the Iowa State Fairgrounds in Des Moines, Iowa on Wednesday, Dec. 28, 2011. Texas Congressman Ron Paul poses with supporters after his "Salute to Veterans" rally at the Iowa State Fairgrounds in Des Moines, Iowa on Wednesday, Dec. 28, 2011. Photo: Lisa Krantz / San Antonio Express-News

Image 22 of 23 Justin Harvey and his wife, Tanis, listen to Republican presidential candidate Ron Paul as their niece Charity, 5, naps during a rally Sunday, March 4, 2012, in Fairbanks, Alaska. Justin Harvey and his wife, Tanis, listen to Republican presidential candidate Ron Paul as their niece Charity, 5, naps during a rally Sunday, March 4, 2012, in Fairbanks, Alaska. Photo: Sam Harrel / The Associated Press