Sarah Palin on the road

Former Alaska Governor Sarah Palin meets with fair-goers while visiting the Cattle Barn at the Iowa State Fair August 12, 2011 in Des Moines, Iowa. Although she has not announced any intention of running for president, all of the Republican presidential hopefuls visited the fair ahead of Saturday's Iowa Straw Poll to greet voters and engage in traditional Iowa campaigning rituals.

Palin greets visitors at the Iowa State Fair in Des Moines, Iowa, Friday, Aug. 12, 2011.

Palin looks Super Bull Champion Bubba during a visit to the Iowa State Fair in Des Moines, Iowa, Friday, Aug. 12, 2011.

Palin greets the crowd after she was interviewed by Sean Hannity of FOX News at the Iowa State Fair in Des Moines, Iowa, Friday, Aug. 12, 2011.

Sarah Palin is greeted by the Rev. Stephen Ayres as she tours the Old North Church in Boston's North End neighborhood, June 2, 2011. Palin, the former Alaska governor and GOP vice presidential candidate, launched her East Coast "One Nation" bus tour of historic American landmarks over Memorial Day weekend, propelling her back into the spotlight and renewing speculation that she may run for the Republican nomination for president in 2012.

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Sarah Palin sits with her youngest daughter Piper, left, and her mother Sally Heath, during a tour of the Old North Church in Boston's North End neighborhood, June 2, 2011.

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Sarah Palin and her youngest daughter Piper tour the Old North Church in Boston's North End neighborhood, June 2, 2011.

Pictures: Sarah Palin's political career
Read more: Palin's bus tour treats reporters like paparazzi

Sarah Palin hands autographed copies of the U.S. Constitution to tourists during her visit to Boston's North End neighborhood, June 2, 2011.

Pictures: Sarah Palin's political career
Read more: Palin's bus tour treats reporters like paparazzi

Sarah Palin talks to the media as she visits Liberty Island in New York, June 1, 2011.

Pictures: Sarah Palin's political career
Read more: Palin's bus tour treats reporters like paparazzi

Sarah Palin, center, her daughter Piper Palin, front, and her parents, Sally and Chuck Heath, pause as a band plays "The Star-Spangled Banner" during their visit to Liberty Island in New York, June 1, 2011.

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Read more: Palin's bus tour treats reporters like paparazzi

Sarah Palin looks up as she approaches the Statue of Liberty on Liberty Island in New York, June 1, 2011.

Pictures: Sarah Palin's political career
Read more: Palin's bus tour treats reporters like paparazzi

Sarah Palin laughs while talking with employees at Liberty Island in New York, June 1, 2011.

Pictures: Sarah Palin's political career
Read more: Palin's bus tour treats reporters like paparazzi

Sarah Palin talks to the media as she leaves Liberty Island in New York, June 1, 2011.

Pictures: Sarah Palin's political career
Read more: Palin's bus tour treats reporters like paparazzi

Sarah Palin waves to visitors on a ferry as she leaves Liberty Island in New York, June 1, 2011.

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Sarah Palin is seen with her daughter Piper outside the Hyatt Regency Hotel, June 1, 2011, in Jersey City, N.J.

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Sarah Palin and Donald Trump walk towards a limo after leaving Trump Tower on May 31, 2011, in New York.

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Donald Trump makes a point as he walks with Sarah Palin outside Trump Tower in New York as they make their way to a scheduled meeting, May 31, 2010.

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Sarah Palin looks back at a crowd as she walks to the door of Trump Tower for a scheduled meeting with Donald Trump in New York, May 31, 2011.

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Sarah Palin walks with Donald Trump outside Trump Tower in New York after their scheduled meeting, May 31, 2010.

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Read more: Palin's bus tour treats reporters like paparazzi
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Sarah Palin's "One Nation" tour bus is parked outside Independence National Historical Park, May 31, 2011, in Philadelphia.

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Sarah Palin makes her way to Independence Hall during her visit to Independence National Historical Park, May 31, 2011, in Philadelphia.

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Sue Boardman, left, a tour guide at the Gettysburg National Military Park, points out a monument's design feature io Sarah Palin, center, and others, May 31, 2011, during a tour of the Civil War battlefield cemetery in Gettysburg, Pa. Palin did not take questions from the media or make any statements during the brief tour.

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Sarah Palin, center, visits a Civil War-era cemetery, May 31, 2011, during a tour of Gettysburg National Military Park in Gettysburg, Pa., with family and friends as part of her "One Nation" bus tour. Sue Boardman, a park tour guide, stands at left.

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Sarah Palin accompanied by daughter Piper Palin, meets with people while viewing the Liberty Bell at Independence National Historical Park, May 31, 2011, in Philadelphia.

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Sarah Palin speaks with her daughter Piper Palin, while viewing the Liberty Bell at Independence National Historical Park, May 31, 2011, in Philadelphia

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Sarah Palin acknowledges the press outside the Liberty Bell Center at Independence National Historical Park during her "One Nation" bus tour, May 31, 2011, in Philadelphia.

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Sarah Palin, center, talks with fans in front of the Courtyard Marriott at Gateway Gettysburg on May 30, 2011.

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Sarah Palin prepares to ride on the back of a motorcycle during the annual Rolling Thunder "Ride for Freedom" rally, which has thousands of motorcycle enthusiasts and military veterans ride from the Pentagon to the Vietnam War Memorial, on May 29, 2011, in Arlington, Va.

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Todd Palin adjusts the strap of the motorcycle helmet of his wife, Sarah Palin, before the pair joined thousands of motorcycle enthusiasts and military veterans participating in the annual Rolling Thunder "Ride for Freedom" rally, on May 29, 2011, in Arlington, Va.

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Sarah Palin rides on a backseat during the annual Rolling Thunder "Ride for Freedom" rally, May 29, 2011, in Arlington, Va.

Pictures: Sarah Palin's political career
Read more: Palin's bus tour treats reporters like paparazzi
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Sarah Palin and Sen. Kelly Ayotte (R-N.H.) having breakfast in New Hampshire, Friday, June 3, 2011. Palin's parents, Chuck and Sally Heath, are in the foreground.

Pictures: Sarah Palin's political career
Read more: Palin's bus tour treats reporters like paparazzi
Read more: Palin causes stir at Rolling Thunder