Paul Ryan addresses the Family Research Council Action Values Voter Summit in Washington, D.C., on Friday. Mandel Ngan/AFP/Getty Images hide caption

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Towns near the Ohio River, including Steubenville, seen here in 2009, are home to many undecided voters. One of them, Brian Snider, says, "This is pretty much a ghost town." Rick Gershon/Getty Images hide caption

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Senate Majority Leader Harry Reid, D-Nev. speaks to the media at the Capitol in March. T.J. Kirkpatrick/Getty Images hide caption

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Ted Cruz, Republican candidate for the U.S. Senate, speaks at a rally organized by the Tea Party Express in San Antonio in May. Hernan Rozemberg/AP hide caption

itoggle caption Hernan Rozemberg/AP