People hold signs, including some reading "America is ready for marriage," at a same-sex marriage victory celebration on Oct. 6 in Salt Lake City, Utah. America may be ready, but Republicans aren't: Rising popular support for same-sex marriage is posing a problem for the GOP. George Frey/Getty Images hide caption

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Republican National Committee chairman Reince Priebus is seen at the Jan. 24 RNC winter meeting in Washington. Priebus celebrates the achievements of black Republicans in a series of new radio ads designed to honor Black History Month. Susan Walsh/AP hide caption

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Republican presidential candidate Mitt Romney and vice presidential candidate Paul Ryan on stage with their wives Ann Romney and Janna Ryan at the Republican National Convention on Aug. 30. Jae C. Hong/AP hide caption

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Schoolchildren tour the bus that civil rights icon Rosa Parks made famous when she refused to give up her seat. Bill Pugliano/Getty Images hide caption

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President Obama waves after signing the Affordable Care Act at the White House on March 23, 2010. Chip Somodevilla/Getty Images hide caption

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