Five-year-old Zoey McCarty holds a placard for Republican presidential candidate, former Pennsylvania Sen. Rick Santorum at his Iowa caucus victory party Tuesday, Jan. 3, 2012, in Johnston, Iowa. (AP Photo/Charlie Riedel)

DES MOINES, IA - JANUARY 03: Campaign volunteer Sam Adkisson (C) of Springfield, Illinois reacts during a rally for Republican presidential candidate, former Massachusetts Gov. Mitt Romney at the Hotel Fort Des Moines on the night of the Iowa Caucuses January 3, 2012 in Des Moines, Iowa. Candidates made a final push to try and sway voters as Iowans took part in the first caucus of the 2012 presidential election. (Photo by Chip Somodevilla/Getty Images)

ANKENY, IA - JANUARY 03: Republican presidential candidate, U.S. Rep. Ron Paul (R-TX) (C) and his wife Carol Paul (L) greet supporters during a rally on the night of the Iowa caucus at the Courtyard Des Moines Ankeny on January 3, 2012 in Ankeny, Iowa. According to early results U.S. Rep. Ron Paul (R-TX) came in third in the Iowa GOP caucus behind former Massachusetts Gov. Mitt Romney and former U.S. Sen. Rick Santorum, who were neck and neck. (Photo by Justin Sullivan/Getty Images)

ANKENY, IA - JANUARY 03: Republican presidential candidate, U.S. Rep. Ron Paul (R-TX) greets supporters during a rally on the night of the Iowa caucus at the Courtyard Des Moines Ankeny on January 3, 2012 in Ankeny, Iowa. According to early results U.S. Rep. Ron Paul (R-TX) came in third in the Iowa GOP caucus behind former Massachusetts Gov. Mitt Romney and former U.S. Sen. Rick Santorum, who were neck and neck. (Photo by Justin Sullivan/Getty Images)

WEST DES MOINES, IA - JANUARY 3: Supporters of Republican presidential candidate, Texas Gov. Rick Perry wait to hear the results of the Iowa Caucus at the Sheraton January 3, 2012 in West Des Moines, Iowa. After months of campaigning by candidates, Iowan voters throughout the state participated in the first caucus of the 2012 presidential election. (Photo by Jonathan Gibby/Getty Images)

Sharon McNutt, co-chair of the Mills County, Iowa, GOP, hand counts the ballots cast at the caucus of precinct 11 in Silver City, Iowa, Tuesday, Jan. 3, 2012. (AP Photo/The Omaha World-Herald, Rebecca S. Gratz) MAGS OUT; NO SALES; TV OUT

WEST DES MOINES, IA - JANUARY 3: Two supporters of Republican presidential candidate, Texas Gov. Rick Perry stand in a nearly empty ballroom, while waiting to hear the results of the Iowa Caucus at the Sheraton January 3, 2012 in West Des Moines, Iowa. After months of campaigning by candidates, Iowan voters throughout the state participated in the first caucus of the 2012 presidential election. (Photo by Jonathan Gibby/Getty Images)

DES MOINES, IA - JANUARY 3: Carolyn Koberg, of Panora, Iowa, (R), picks out a campaign t-shirt while waiting for Republican presidential candidate, former Speaker of the House Newt Gingrich to arrive for the results of the Iowa caucus at the Community Choice Credit Union Convention Center on January 3, 2012 in Des Moines, Iowa. Early results placed Gingrich fourth behind a three-way tie between Republican presidential candidates former Massachusetts Gov. Mitt Romney, former U.S. Sen. Rick Santorum and U.S. Rep Ron Paul (R-TX). (Photo by T.J. Kirkpatrick/Getty Images)

Supporters of former Pennsylvania Sen. Rick Santorum compare Iowa republican presidential caucus returns on their smartphones at the Republican presidential candidate's victory party Tuesday, Jan. 3, 2012, in Johnston, Iowa. (AP Photo/Charlie Riedel)

JOHNSTON, IA - JANUARY 03: Zoey McCarty, center, and other supporters of Republican presidential hopeful and former U.S. Sen. Rick Santorum wait at the Stoney Creek Inn for the arrival of Santorum, where he will find out the final results of the 2012 Iowa caucuses, on January 3, 2012 in Johnston, Iowa. Candidates made a final push to try and sway voters as Iowans took part in the first caucus of the 2012 presidential election. (Photo by Andrew Burton/Getty Images)

Republican presidential candidate former Pennsylvania Sen. Rick Santorum, center, looks over Iowa Republican presidential caucus returns with campaign staff in his hotel room Tuesday, Jan. 3, 2012, in Johnston, Iowa. (AP Photo/Charlie Riedel)

Republican presidential candidate Texas Gov. Rick Perry gets ready for an interview during a caucus night watch party Tuesday, Jan. 3, 2012, in West Des Moines, Iowa. (AP Photo/Evan Vucci)

WEST DES MOINES, IA - JANUARY 3: Republican presidential candidate, Texas Gov. Rick Perry (L) greets supporters waiting to hear the results of the caucus at the Sheraton January 3, 2012 in West Des Moines, Iowa. After months of campaigning by candidates, Iowan voters throughout the state participated in the first caucus of the 2012 presidential election. (Photo by Jonathan Gibby/Getty Images)

WEST DES MOINES, IA - JANUARY 3: Republican presidential candidate, Texas Gov. Rick Perry (C) greets supporters waiting to hear the results of the caucus at the Sheraton January 3, 2012 in West Des Moines, Iowa. After months of campaigning by candidates, Iowan voters throughout the state participated in the first caucus of the 2012 presidential election. (Photo by Jonathan Gibby/Getty Images)

WEST DES MOINES, IA - JANUARY 3: Republican presidential candidate, Texas Gov. Rick Perry poses for a portrait with supporters while waiting to hear the results of the caucus at the Sheraton January 3, 2012 in West Des Moines, Iowa. After months of campaigning by candidates, Iowan voters throughout the state participated in the first caucus of the 2012 presidential election. (Photo by Jonathan Gibby/Getty Images)

JOHNSTON, IA - JANUARY 03: Jim Bob Duggar, left, a prominant supporter of Republican presidential hopeful and former U.S. Sen. Rick Santorum, speaks to a broadcast journalist at the Stoney Creek Inn, where Santorum will find out the final results of the 2012 Iowa caucuses, on January 3, 2012 in Des Moines, Iowa. Candidates made a final push to try and sway voters as Iowans took part in the first caucus of the 2012 presidential election. (Photo by Andrew Burton/Getty Images)

ANKENY, IA - JANUARY 03: A supporter of Republican presidential candidate, U.S. Rep. Ron Paul (R-TX) looks on at a rally on the night of the Iowa caucus at the Courtyard Des Moines Ankeny on January 3, 2012 in Ankeny, Iowa. Candidates made a final push to try and sway voters as Iowans took part in the first caucus of the 2012 presidential election. (Photo by Justin Sullivan/Getty Images)

DES MOINES, IA - JANUARY 03: Supporters and volunteers react to news on the television during a rally for Republican presidential candidate, former Massachusetts Gov. Mitt Romney at the Hotel Fort Des Moines on the night of the Iowa Caucuses January 3, 2012 in Des Moines, Iowa. Candidates made a final push to try and sway voters as Iowans took part in the first caucus of the 2012 presidential election. (Photo by Chip Somodevilla/Getty Images)

DES MOINES, IA - JANUARY 3: A staff member of Republican presidential candidate, former Speaker of the House Newt Gingrich stands before the stage where the candidate will speak as results are announced in the Iowa caucus at the Community Choice Credit Union Convention Center on January 3, 2012 in Des Moines, Iowa. Early results placed Gingrich fourth behind a three-way tie between Republican presidential candidates former Massachusetts Gov. Mitt Romney, former U.S. Sen. Rick Santorum and U.S. Rep Ron Paul (R-TX). (Photo by T.J. Kirkpatrick/Getty Images)

Votes are counted in the Third Ward Precint 1 caucus Tuesday night, Jan. 3, 2012, in the library of Mason City High School in Mason City, Iowa. (AP Photo/The Globe-Gazette, Jake Rajewsky)

ANKENY, IA - JANUARY 03: Voters register at the Ankeny 9 Republican caucus on January 3, 2012 in Ankeny, Iowa. Iowans are preparing to caucus to vote for their favorite Republican candidate for president. (Photo by Justin Sullivan/Getty Images)

DES MOINES, IA - JANUARY 03: Louisiana Gov. Bobby Jindal speaks to Principal Financial Group employees in support of Republican presidential candidate, Texas Gov. Rick Perry on the day of the Iowa Caucus January 3, 2012 in Des Moines, Iowa. The GOP presidential contenders are crisscrossing Iowa in the final stretch of campaigning in the state before tonight's caucus, the first test the candidates must face before becoming the Republican presidential nominee. (Photo by Andrew Burton/Getty Images)

DES MOINES, IA - JANUARY 03: Republican presidential candidate, Texas Gov. Rick Perry speaks to Principal Financial Group employees on the day of the Iowa Caucus January 3, 2012 in Des Moines, Iowa. The GOP presidential contenders are crisscrossing Iowa in the final stretch of campaigning in the state before tonight's caucus, the first test the candidates must face before becoming the Republican presidential nominee. (Photo by Andrew Burton/Getty Images)

MUSCATINE, IA - JANUARY 3: Republican presidential candidate, former Speaker of the House Newt Gingrich with his wife Callista Gingrich consider their ice cream options before leaving a campaign stop on the day of the Iowa Caucus, at Elly's Tea January 3, 2012 in Muscatine, Iowa. After a surge of support in early December, Gingrich saw a double digit-drop to 12 percent in last week's Des Moines Register poll, compared to front-runner Mitt Romney's 24 percent going in to the caucus. (Photo by T.J. Kirkpatrick/Getty Images)

MUSCATINE, IA - JANUARY 3: Republican presidential candidate, former Speaker of the House Newt Gingrich speaks at a campaign stop to bolster support on the day of the Iowa Caucus, at Elly's Tea January 3, 2012 in Muscatine, Iowa. After a surge of support in early December, Gingrich saw a double digit-drop to 12 percent in last week's Des Moines Register poll, compared to front-runner Mitt Romney's 24 percent going in to the caucus. (Photo by T.J. Kirkpatrick/Getty Images)

MUSCATINE, IA - JANUARY 3: Republican presidential candidate, former Speaker of the House Newt Gingrich speaks at a campaign stop to bolster support on the day of the Iowa Caucus, at Elly's Tea January 3, 2012 in Muscatine, Iowa. After a surge of support in early December, Gingrich saw a double digit-drop to 12 percent in last week's Des Moines Register poll, compared to front-runner Mitt Romney's 24 percent going in to the caucus. (Photo by T.J. Kirkpatrick/Getty Images)

Republican presidential candidate, Rep. Michele Bachmann, R-Minn., left, accompanied by her mother Jean LaFave, speaks at the Black Hawk County Republican caucuses site at the UNI-Dome Tuesday, Jan. 3, 2012, in Cedar Falls, Iowa. (AP Photo/Waterloo Courier, Brandon Pollock)

Barb Hansen tallies votes during a caucus of precinct 42 near Smithland, Iowa Tuesday, Jan. 3, 2012. Former Massachusetts Gov. Mitt Romney, Texas Rep. Ron Paul and former Pennsylvania Sen. Rick Santorum shared the straw poll ballot with former House Speaker Newt Gingrich, Texas Gov. Rick Perry and Minnesota Rep. Michele Bachmann in a caucus race as jumbled as any in the 40 years since Iowa gained the presidential campaign lead-off position. (AP Photo/Dave Weaver)

Republican presidential candidate, Rep. Michele Bachmann, R-Minn., greets caucus-goers at the Black Hawk County Republican caucuses site at the UNI-Dome Tuesday, Jan. 3, 2012, in Cedar Falls, Iowa. (AP Photo/Waterloo Courier, Matthew Putney)

DES MOINES, IA - JANUARY 3: Republican presidential candidate, U.S. Rep. Ron Paul (R-TX) (C) greets supporters at the Courtyard Des Moines Ankeny in Ankeny, Iowa after his third-place finish in the Iowa caucus Tuesday. According to early results U.S. Rep. Ron Paul (R-TX) came in third in the Iowa GOP caucus behind former Massachusetts Gov. Mitt Romney and former U.S. Sen. Rick Santorum, who were neck and neck. (Photo by Mark Kegans/Getty Images)

DES MOINES, IA - JANUARY 3: Republican presidential candidate, U.S. Rep. Ron Paul (R-TX) and his wife, Carol, greet supporters at the Courtyard Des Moines Ankeny in Ankeny, Iowa after his third-place finish in the Iowa caucus Tuesday. According to early results U.S. Rep. Ron Paul (R-TX) came in third in the Iowa GOP caucus behind former Massachusetts Gov. Mitt Romney and former U.S. Sen. Rick Santorum, who were neck and neck. (Photo by Mark Kegans/Getty Images)

ANKENY, IA - JANUARY 03: Republican presidential candidate, U.S. Rep. Ron Paul (R-TX) (L) stands with U.S. Army Corp. Jesse Thorsen during a rally on the night of the Iowa caucus at the Courtyard Des Moines Ankeny on January 3, 2012 in Ankeny, Iowa. According to early results U.S. Rep. Ron Paul (R-TX) came in third in the Iowa GOP caucus behind former Massachusetts Gov. Mitt Romney and former U.S. Sen. Rick Santorum, who were neck and neck. (Photo by Justin Sullivan/Getty Images)

ANKENY, IA - JANUARY 03: TEST - Republican presidential candidate, U.S. Rep. Ron Paul (R-TX) speaks to supporters during a rally on the night of the Iowa caucus at the Courtyard Des Moines Ankeny on January 3, 2012 in Ankeny, Iowa. According to early results U.S. Rep. Ron Paul (R-TX) came in third in the Iowa GOP caucus behind former Massachusetts Gov. Mitt Romney and former U.S. Sen. Rick Santorum, who were neck and neck. (Photo by Justin Sullivan/Getty Images)

Republican presidential candidate Rep. Ron Paul, R-Texas, speaks at his caucus night rally, Tuesday, Jan. 3, 2012, in Ankemy, Iowa. Paul's wife, Carol, is at left.(AP Photo/Eric Gay)

ANKENY, IA - JANUARY 03: Republican presidential candidate, U.S. Rep. Ron Paul (R-TX) (C) and his wife Carol Paul (L) greet supporters during a rally on the night of the Iowa caucus at the Courtyard Des Moines Ankeny on January 3, 2012 in Ankeny, Iowa. According to early results U.S. Rep. Ron Paul (R-TX) came in third in the Iowa GOP caucus behind former Massachusetts Gov. Mitt Romney and former U.S. Sen. Rick Santorum, who were neck and neck. (Photo by Justin Sullivan/Getty Images)