David Gregory

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This Feb. 24, 2013 photo released by NBC News shows moderator David Gregory on the set of "Meet the Press," in Washington. NBC News President Deborah Turness said in a memo to the Sunday morning public affairs program staff members that she supports Gregory "now and into the future." Once the dominant Sunday morning program, "Meet the Press" has sunk behind competing shows by CBS and ABC in the ratings. (AP Photo/NBC, William B. Plowman)

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Boston Marathon bombing survivor Adrianne Haslet-Davis allegedly walked out of the set of Meet the Press with David Gregory (right).

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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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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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David Gregory holding a 30-round magazine at NBC's Washington bureau (NBC/Meet the Press)

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“Meet the Press” host David Gregory displays an unloaded high-capacity gun magazine during the talk show’s broadcast Sunday. (NBC)

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Screen shot from "Meet the Press" of David Gregory speaking to Wayne LaPierre. (NBC)

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Former Virginia Gov. Tim Kaine, right, waves to the audience after shaking hands with moderator David Gregory at the beginning of the 2012 U.S. Senate Debate on Thursday, Sept. 20, 2012 at the Capital One Conference Center in McLean, Va. (Barbara L. Salisbury/The Washington Times)

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Six Republican presidential candidates — (from left) former Utah Gov. Jon Huntsman, former Pennsylvania Sen. Rick Santorum, former Massachusetts Gov. Mitt Romney, Texas Rep. Ron Paul, former House Speaker Newt Gingrich and Texas Gov. Rick Perry — listen to a question from David Gregory, moderator of NBC's "Meet the Press," during a GOP presidential candidate debate at the Capitol Center for the Arts in Concord, N.H., on Sunday, Jan. 8, 2012. (AP Photo/Charles Krupa)