Mark R. Warner

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Despite GOP gains in several other races, Republican Ed Gillespie trails incumbent Democratic Sen. Mark R. Warner by a double-digit margin in Virginia. (associated press)

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President Obama is joined at the White House by Mark Miller (back, second from left), Ellyn Miller, and son Jake Miller, who are applauded by Sen. Orrin G. Hatch, (back, left), Sen. Mark R. Warner, (fourth from left), Mike Gillette and Rep. Eric Cantor (right) after Mr. Obama signed into law a bill, the Gabriella Miller Kids First Research Act, on Thursday. (associated press)

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Sen. Barbara A. Mikulski of Maryland, along with Sen. Mark R. Warner of Virginia (left) and Sen. Benjamin L. Cardin of Maryland, all Democrats, urge House Republicans to pass a clean continuing resolution to end the federal government shutdown. (andrew harnik/the wasHingTON times)

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Sen. Mark R. Warner, Virginia Democrat, is one of the lead sponsors of the proposed Housing Finance Reform and Taxpayer Protection Act.

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Sen. Mark R. Warner (right) holds a large lead in a hypothetical Senate race with Virginia Gov. Bob McDonnell. Mr. Warner is running for re-election in 2014. Virginia governors are limited to a single term. (Associated Press)

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Sen. Mark R. Warner (left), Virginia Democrat, arrives to offer introductory remarks for John O. Brennan before the Senate Select Committee on Intelligence at a hearing on Capitol Hill in Washington on Thursday, Feb. 7, 2013, on Mr. Brennan's nomination to head the Central Intelligence Agency. (Andrew Harnik/The Washington Times)

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Sen. Mark R. Warner, Virginia Democrat (The Washington Times)

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Senate candidate Tim Kaine (left) is joined by Sens. Mark R. Warner (center) and Jim Webb, both fellow Virginia Democrats, in greeting his supporters after speaking at a campaign rally at Claude Moore Park in Sterling, Va., on Monday. (Andrew Harnik/The Washington Times)