Rep. Michele Bachmann (R-MN) (C) greets the family of former U.S. Senator Rick Santorum (R-PA) after a two-hour Republican presidential candidate debate in the Stephens Auditorium at Iowa State University August 11, 2011 in Ames, Iowa. This is the first Republican presidential debate in the state ahead of Saturday's all important Iowa Straw Poll.
- [Chip Somodevilla/AFP/Getty Images]

Republican presidential candidates former Massachusetts Gov. Mitt Romney (R) and Rep. Ron Paul, R-Texas are pictured during the Iowa GOP/Fox News Debate on August 11, 2011 at the CY Stephens Auditorium in Ames, Iowa. This is the first Republican presidential debate in the state ahead of Saturday's all important Iowa Straw Poll.
- [Pool/AFP/Getty Images]

William Temple, dressed as Button Gwinnett one of the signers of the Declaration of Independence, waits in line to enter Stephens Auditorium at Iowa State University, for the Republican party debate August 11, 2011 in Ames, Iowa. Most of the eight Republican presidential hopefuls participating in tonight’s debate have spent the week campaigning across the state to prepare for the debate and Saturday's Iowa Straw Poll.
- [Scott Olson/AFP/Getty Images]

A supporter of former Minnesota governor Tim Pawlenty buys a button from a vendor outside the Stephens Auditorium at Iowa State University, the site of the Republican party debate August 11, 2011 in Ames, Iowa.
- [Scott Olson/AFP/Getty Images]

Former U.S. Senator from Pennsylvania Rick Santorum arrives at the Stephens Auditorium at Iowa State University for the Republican party debate August 11, 2011 in Ames, Iowa.
- [Scott Olson/AFP/Getty Images]

Minnesota Congresswoman Michele Bachmann arrives at the Stephens Auditorium at Iowa State University for the Republican party debate August 11, 2011 in Ames, Iowa.
- [Scott Olson/AFP/Getty Images]

Republican presidential candidates (L-R) former U.S. Senator Rick Santorum, businessman Herman Cain, Rep. Ron Paul (R-TX), former Massachusetts Governor Mitt Romney, Rep. Michele Bachmann (R-MN), former Minnesota Governor Tim Pawlenty, former Utah Governor Jon Huntsman and former Speaker of the House Newt Gingrich (R-GA) take the stage for a debate in the Stephens Auditorium at Iowa State University August 11, 2011 in Ames, Iowa. This is the first Republican presidential debate in the state ahead of Saturday's all important Iowa Straw Poll.
- [Chip Somodevilla/AFP/Getty Images]

Republican presidential candidate Rep. Michele Bachmann (R-MN) takes the stage for a debate in the Stephens Auditorium at Iowa State University August 11, 2011 in Ames, Iowa. This is the first Republican presidential debate in the state ahead of Saturday's all important Iowa Straw Poll.
- [Chip Somodevilla/AFP/Getty Images]

Republican presidential candidates (L-R) former Rep. Ron Paul (R-TX), former Massachusetts Governor Mitt Romney, Rep. Michele Bachmann (R-MN), former Minnesota Governor Tim Pawlenty and former Utah Governor Jon Huntsman take the stage for a debate in the Stephens Auditorium at Iowa State University August 11, 2011 in Ames, Iowa. This is the first Republican presidential debate in the state ahead of Saturday's all important Iowa Straw Poll.
- [Chip Somodevilla/AFP/Getty Images]

Voters put corn kernals into jars with their favorite Republican presidential candidates on the first day of the Iowa State Fair August 11, 2011 in Des Moines, Iowa. The candidates, including Mitt Romney, John Huntsman and Newt Gingrich, visited the fair ahead of Saturday's Iowa Straw Poll to greet voters and engage in traditional Iowa campaigning rituals.
- [Chip Somodevilla/AFP/Getty Images]

Republican presidential candidate and former Speaker of the House Newt Gingrich (C) and his wife Callista Gingrich greet voters at the Iowa State Fair August 11, 2011 in Des Moines, Iowa. Gingrich was a the fair ahead of Saturday's Iowa Straw Poll to greet voters and engage in traditional Iowa campaigning rituals.
- [Chip Somodevilla/AFP/Getty Images]

Republican presidential candidate Mitt Romney (C) introduces himself to voters at the Iowa State Fair August 11, 2011 in Des Moines, Iowa. Romney was a the fair ahead of Saturday's Iowa Straw Poll to greet voters and engage in traditional Iowa campaigning rituals.
- [Chip Somodevilla/AFP/Getty Images]

Republican presidential candidate Mitt Romney (C) introduces himself to voters at the Iowa State Fair August 11, 2011 in Des Moines, Iowa. Romney was a the fair ahead of Saturday's Iowa Straw Poll to greet voters and engage in traditional Iowa campaigning rituals.
- [Chip Somodevilla/AFP/Getty Images]

Republican presidential candidate Mitt Romney (C) introduces himself to voters at the Iowa State Fair August 11, 2011 in Des Moines, Iowa. Romney was a the fair ahead of Saturday's Iowa Straw Poll to greet voters and engage in traditional Iowa campaigning rituals.
- [Chip Somodevilla/AFP/Getty Images]

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- [Chip Somodevilla/AFP/Getty Images]

Republican presidential candidate Mitt Romney addresses a large audience during his time on the Des Moines Register's "Soapbox" at the Iowa State Fair August 11, 2011 in Des Moines, Iowa. Romney was a the fair to greet people and engage in traditional Iowa campaigning rituals.
- [Chip Somodevilla/AFP/Getty Images]

Republican presidential candidate U.S. Rep. Michele Bachmann (R-MN) talks to a nurse about repealing "Obamacare" during a rally at a GOP Picnic August 9, 2011 in Humboldt, Iowa. Bachmann is campaigning across Iowa ahead of the all-importnat Iowa Staw Poll Saturday.
- [Chip Somodevilla/AFP/Getty Images]

Republican presidential candidate U.S. Rep. Michele Bachmann (R-MN) gets the crowd excited during a GOP Picnic August 9, 2011 in Humboldt, Iowa. Bachmann is campaigning across Iowa ahead of the all-importnat Iowa Staw Poll Saturday.
- [Chip Somodevilla/AFP/Getty Images]

Republican presidential candidate U.S. Rep. Michele Bachmann (R-MN) greets supporters during a rally at a GOP Picnic August 9, 2011 in Humboldt, Iowa. Bachmann is campaigning across Iowa ahead of the all-importnat Iowa Staw Poll Saturday.
- [Chip Somodevilla/AFP/Getty Images]

Rick Santorum, former U.S. Senator from Pennsylvania and Republican presidential hopeful, speaks to voters during a campaign stop at the Pizza Ranch on August 9, 2011 in Manchester, Iowa. Most of the Republican presidential candidates are crisscrossing Iowa this week hoping to gain support in front of the Republican Party debate and Iowa Straw Poll.
- [Scott Olson/AFP/Getty Images]