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As the U.S. Senate remains divided over backing Keystone XL, Virginia’s two Democratic senators also differ in their opinions on the 1,179-mile pipeline that would carry crude oil from Canada to U.S. refineries in the Midwest and along the Gulf Coast.

The Senate is set to vote on legislation today that would approve the project. The House passed its own measure Friday, carried by 221 Republicans, with not a single GOP lawmaker voting against it. Only 31 Democrats backed the bill, while 161 rejected it.

Sen. Timothy M. Kaine, D-Va., elected to the Senate in 2012, remains opposed to the pipeline. But Sen. Mark R. Warner, D-Va., who won his re-election bid by a narrow margin against Republican Ed Gillespie two weeks ago, is a co-sponsor of the Senate version of the bill, which was introduced by Sen. John Hoeven, R-N.D., and he is eager to move forward.

“My record on Keystone is clear: I support the pipeline. After six years of study and debate, it’s time to approve this project and get on with it,” Warner said in an email Monday.

Kaine, also in an email, said he concluded last year, “after a great deal of study,” that it is not in the country’s national interest to approve a pipeline that would transport tar sands oil, which he said is 15 to 20 percent dirtier than conventional oil.