Republican presidential candidate Carly Fiorina poses for a photo in front of the Butter Cow while touring the Iowa State Fair on Monday in Des Moines. Justin Sullivan/Getty Images hide caption

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Republican presidential candidates Donald Trump (right) and Wisconsin Gov. Scott Walker speak together during a commercial break at the first Republican presidential debate in Cleveland on Thursday. Trump's remarks about Fox News debate moderator Megyn Kelly have triggered a firestorm. Andrew Harnik/AP hide caption

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Republican presidential candidates from left, Jim Gilmore, Lindsey Graham, Bobby Jindal, Rick Perry, Rick Santorum, Carly Fiorina, and George Pataki take the stage for a pre-debate forum at the Quicken Loans Arena, Thursday, Aug. 6, 2015, in Cleveland. Seven of the candidates have not qualified for the primetime debate. Andrew Harnik/AP hide caption

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Wisconsin Gov. Scott Walker offers cheese and ice cream to guests in his hospitality room at the Iowa Lincoln Day Dinner in Des Moines on Saturday. Charlie Neibergall/AP hide caption

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Carly Fiorina, GOP candidate for Senate from California. Pool/Getty Images hide caption

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