Abdullah Abullah (left) and Ashraf Ghani, shown here on August 8, have been contesting the results of Afghanistan's runoff presidential election for months. They are expected to sign a power-sharing deal on Sunday. Wakil Kohsar/AFP/Getty Images hide caption

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A voter fills out a ballot Sunday in Jersey City, New Jersey. Gov. Chris Christie ordered early-voting stations to stay open through the weekend. Andrew Burton/Getty Images hide caption

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Final preparations were under way Monday for the opening of the Republican National Convention in Tampa, Fla. Democrats are holding their convention next week in Charlotte, N.C. Stan Honda/AFP/Getty Images hide caption

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Can you recognize the top five logical fallacies lobbed so far in this year's presidential campaign? spxChrome/iStockphoto.com hide caption

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Jan White, left, Brenda Robertson, center, and Janet Freixas, right, count paper ballots at the headquarters of the Douglas County Republican Party Saturday in Minden, Nev., following county-wide Nevada caucus meetings. Ted S. Warren/AP hide caption

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Perry prepares to speak with voters attending the West Des Moines caucus in Iowa on Jan. 3. Jonathan Gibby/Getty Images hide caption

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Mitt Romney speaks during a Chamber of Commerce breakfast Monday in Nashua, N.H. Justin Sullivan/Getty Images hide caption

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