Nbc

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Husband-and-wife singers Blake Shelton (right) and Miranda Lambert perform an acoustic version of the hit "Over You" during a broadcast of the singing competition series "The Voice" in Los Angeles on Tuesday, May 21, 2013. Mr. Shelton, an Oklahoma native, and NBC are putting together a benefit for tornado victims in his home state. (AP Photo/NBC, Trae Patton)

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NBC News' David Gregory holds up 30-round magazine on "Meet the Press" in Washington, D.C.

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Actress Megan Hilty from the NBC series "Smash" attends the White House Correspondents' Association Dinner at the Washington Hilton Hotel on Saturday, April 27, 2013, in Washington. (Evan Agostini/Invision/AP)

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NBC Sports announcer Al Michaels is pictured in Beverly Hills, Calif., in 2011. (AP Photo/Chris Pizzello)

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** FILE ** Actor Jay Pharoah impersonates President Obama on NBC's "Saturday Night Live" on Saturday, March 2, 2013. (Associated Press)

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**FILE** Bonnie Franklin, of the 1970's sitcom "One Day at a Time," appears with the reunited cast on the the NBC "Today" television program in New York on Feb. 26, 2008. (Associated Press)

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David Gregory hosts NBC's "Meet the Press" from the site of the Republican National Convention in Tampa, Fla., on Sunday, Aug. 26, 2012. (AP Photo/NBC, Virginia Sherwood)

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"We're in a different kind of war,” Sen. Richard J. Durbin, Illinois Democrat (left), said on NBC's "Meet the Press.” about the use of drones. “We've got to strike a new constitutional balance.” (Associated Press)

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Josh Gad plays Skip, the bumbling son of the U.S. president, in "1600 Penn." The comedy airs 9:30 p.m. Thursday on NBC. Bill Pullman is the president. (NBC via Associated Press)