Attendees visit the trade booths during the National Rifle Association's annual meeting in Nashville, Tenn., in April. Harrison McClary/Reuters /Landov hide caption
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Rev. Billy Graham poses for a portrait in 1968. Getty Images hide caption
Gallup's latest polling on how Americans feel about the way they're being governed. Gallup.com hide caption
The dark line shows support for same-sex marriage. Gallup.com hide caption