Some Senate Democrats are already saying they will vote to override President Obama's veto of legislation authorizing the Keystone XL oil pipeline. Sens. Joe Manchin (W.Va.), Claire McCaskill (Mo.), Heidi Heitkamp (N.D.) and Bob Casey (Pa.) will vote to override Obama’s veto, according to aides, and it’s possible that several other Democrats will follow suit. Don Stewart, spokesman for Senate Majority Leader Mitch McConnell (R-Ky.), said the "Senate will soon vote on an override" of the veto, with the action coming "not later than March the 3rd."