James Clyburn

FILE - In this Jan. 5, 2017, file photo, House Assistant Minority Leaser James Clyburn of S.C speaks during a news conference on Capitol Hill in Washington. Members of the Congressional Black Caucus expressed bafflement and dismay on Feb. 16, after President Donald Trump asked a black reporter to set up a meeting with them. Clyburn said there is "an element of disrespect" in Trump's comment to journalist April Ryan, asking her whether she was friends with CBC members and could convene a get-together. (AP Photo/Zach Gibson, File)

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President Barack Obama walks with House Minority Leader Nancy Pelosi of Calif., right and House Minority Assistant Leader James Clyburn of S.C., as he visits Capitol Hill in Washington, Friday, June 12, 2015, for a meeting with House Democrats. The president made an 11th-hour appeal to dubious Democrats on Friday in a tense run-up to a House showdown on legislation to strengthen his hand in global trade talks (AP Photo/Carolyn Kaster) (credit)

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President Barack Obama walks with House Minority Leader Nancy Pelosi of Calif., right and House Minority Assistant Leader James Clyburn of S.C., as he visits Capitol Hill in Washington, Friday, June 12, 2015, for a meeting with House Democrats. The president made an 11th-hour appeal to dubious Democrats on Friday in a tense run-up to a House showdown on legislation to strengthen his hand in global trade talks (AP Photo/Carolyn Kaster) **FILE**

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U.S. Rep. James Clyburn, D-S.C., talks to reporters on Thursday, April 2, 2015, in Columbia, S.C. Clyburn said he is worried religious freedom laws being passed in a number of states are as bad as the racial discrimination laws passed a century ago. (AP Photo/Jeffrey Collins)

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Anthony Culler, the Republican nominee challenging Rep. James Clyburn in South Carolina, has written a lengthy Facebook post condemning same-sex marriage and labeling gay couples "gremlins" who seek to "destroy our way of life." (Facebook/Anthony Culler)