Former Minnesota Gov. Tim Pawlenty and GOP presidential candidate Mitt Romney campaign in Las Vegas on Oct. 17, 2011. Ethan Miller/Getty Images hide caption

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Mitt Romney appears on ABC News in one of the five TV interviews he did Friday. He mostly responded to comments from the Obama campaign about his role at Bain Capital. ABC News hide caption

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Will these Green Bay fans be cheering as much as they did during the 2011 Super Bowl when their beloved Packer games are interrupted by local political ads this fall? Matt Ludtke/Getty Images hide caption

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President Obama at a stop on his bus tour of Ohio in Port Clinton on July 5. Jim Watson/AFP/Getty Images hide caption

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Bank of America stadium in Charlotte, N.C., where President Obama will accept his party's nomination on Sept. 6. Jeff Siner/MCT/Landov hide caption

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Daniella Urbina, a field organizer for President Obama in Denver, appears in a Spanish-language campaign ad. YouTube hide caption

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Democrat Ron Barber (left) and Republican Jesse Kelly during a May 23 debate in Tucson. They are running Tuesday in a special election to replace retired Rep. Gabrielle Giffords. Kelly Presnell/Arizona Daily Star hide caption

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Democratic Senate candidate Heidi Heitkamp greets a supporter before a town hall meeting in Minot, N.D., on May 3. Dale Wetzel/AP hide caption

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An air traffic controller works at the Atlanta TRACON, or terminal radar approach control, facility in Peachtree City, Ga. The FAA's NextGen program will modernize the air traffic control system, transforming it from radar to GPS-based technology. David Goldman/AP hide caption

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Joe Ricketts, whose American Film Company produced The Conspirator, arrives at the film's premiere during the Toronto International Film Festival in 2010. Alberto E. Rodriguez/Getty Images hide caption

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Nebraska state Sen. Deb Fischer applauds supporters at her election party Tuesday in Lincoln, Neb. At right is Fischer's mother, Florence Strobel. Nati Harnik/AP hide caption

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The four top Republicans seeking the GOP nomination for the U.S. Senate in Nebraska — state Sen. Deb Fischer (from left), state Attorney General Jon Bruning, state Treasurer Don Stenberg and investment adviser Pat Flynn — recite the Pledge of Allegiance before a debate in Omaha last month. Nati Harnik/AP hide caption

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An image from the Republican National Committee's Facebook page advertises its new "Social Victory Center" app. RNC via Facebook.com hide caption

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House Speaker John Boehner administers the House oath to Rep. Jason Altmire, D-Pa., on Jan. 5, 2011. Alex Brandon/AP hide caption

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In a campaign video, the Mitt Romney campaign accuses President Obama of "spending millions to sling mud — or oil — at Mitt Romney." MittRomney.com hide caption

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