Supporters cheer in Colorado Springs, Colo., as a television broadcast declares that Republicans have taken control of the Senate. Republican candidates, party committees and outside groups spent about $44 million more than Democrats, according to the Center for Responsive Politics. Marc Piscotty/Getty Images hide caption

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Sen. Rand Paul, R-Ky., center, meets with members of the Londonderry Fish and Game Club in Litchfield, N.H., on Jan. 14. Paul was one of three GOP presidential hopefuls who attended Sunday's semiannual gathering of David and Charles Koch's donor network in California. Jim Cole/AP hide caption

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Congressional Republicans have "been given a second chance by the American people," AFP President Tim Phillips said. "And we're going to hold them accountable. We're determined about that." Phelan M. Ebenhack/AP hide caption

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