US-POLITICS-CONGRESS-SENATE

US Senator Mary Landrieu, Democrat of Louisiana, speaks during a press conference following a Senate vote on the rejection of the Keystone XL oil pipeline at the US...

US Senator Mary Landrieu, Democrat of Louisiana, speaks during a press conference following a Senate vote on the rejection of the Keystone XL oil pipeline at the US Capitol in Washington, DC, November 18, 2014. The pipeline, which would bring oil from tar sands in Alberta, Canada to refineries on the US Gulf coast, easily passed the Republican-controlled House last week, as it has several times before, but US President Barack Obama has signalled he might veto the bill should it pass the Senate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)