Reuters: The U.S. Senate failed on Wednesday to override President Barack Obamas veto of legislation approving the Keystone XL oil pipeline, leaving the controversial project to await an administration decision on whether to permit or deny it. The Senate mustered just 62 votes in favor of overriding the veto, short of the two-thirds needed. Thirty-seven senators voted to sustain Obamas veto. The Senate action means the House of Representatives will not vote on override. Republican Senator John Hoeven...