The Senate approved legislation Thursday that would mandate the construction of the controversial Keystone XL pipeline, a bipartisan vote that will set the stage for a veto showdown with President Obama. On a 62-to-36 vote, Republicans and nine Democrats approved a bill that mandates construction of the 840-mile energy pipeline that Obama has vowed to veto while federal environmental reviews continue. Both of Missouri’s U.S. Senators voted in favor of the legislation. The vote is five votes short of the amount needed to override a presidential veto.