Rob Portman

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"My amendment prohibits the government from punishing a religious institution and thereby seeks to keep the state from interfering in matters of faith," Sen. Rob Portman, Ohio Republican says of the ENDA bill. (ASSOCIATED PRESS)

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Sen. Rob Portman (center), Ohio Republican, center, talks with a reporter about the closed-door briefing he and other members of the Homeland Security and Governmental Affairs Committee received about the Benghazi attack on Thursday, Nov. 29, 2012, at the U.S. Capitol. (Barbara L. Salisbury/The Washington Times)

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**FILE** Republican presidential candidate Mitt Romney (left on stage) is introduced by his running mate Paul Ryan as Sen. Rob Portman, Ohio Republican, watches during a Oct. 12, 2012, campaign event in Lancaster, Ohio. (Associated Press)

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Republican presidential candidate Mitt Romney visits the John Quincy Adams room with Sen. Rob Portman (right), Ohio Republican, his wife, Jane, and daughter, Sally, as he campaigns at The Golden Lamb Inn and Restaurant in Lebanon, Ohio, on Oct. 13, 2012. (Associated Press)

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Republican presidential candidate and former Massachusetts Gov. Mitt Romney campaigns with Sen. Rob Portman, Ohio Republican, in front of The Golden Lamb inn and restaurant in Lebanon, Ohio, Saturday, Oct. 13, 2012. (AP Photo/Charles Dharapak)

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Republican presidential candidate, former Massachusetts Gov. Mitt Romney walks with Sen. Rob Portman, R-Ohio, as he arrives in Richmond, Va., Friday, Oct. 12, 2012. (AP Photo/Charles Dharapak)

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Republican presidential candidate, former Massachusetts Gov. Mitt Romney walks with Sen. Rob Portman, R-Ohio, as he arrives in Richmond, Va., Friday, Oct. 12, 2012. (AP Photo/Charles Dharapak)

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** FILE ** Republican presidential candidate, former Massachusetts Gov. Mitt Romney, right, watches the vice presidential debate with Sen. Rob Portman, R- Ohio, left, in his hotel room in Asheville, N.C. (AP Photo/ Evan Vucci)

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Republican presidential candidate Mitt Romney campaigns with New Jersey Gov. Chris Christie (center) and Sen. Rob Portman (right), Ohio Republican, in Cuyahoga Falls, Ohio, on Tuesday, Oct. 9, 2012. (AP Photo/Mark Stahl)

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Republican presidential candidate and former Massachusetts Gov. Mitt Romney talks with Sen. Rob Portman, R-Ohio, who has also been his debate practice partner, on his campaign charter plane en route Denver, Monday, Oct. 1, 2012. (AP Photo/Charles Dharapak)