The Democrats own this one.

The 56-42 vote staves off an election-year rebuke of Obama, but will give political ammunition to backers of TransCanada Corp.’s plan to build a pipeline connecting Alberta’s massive tar sands projects to Gulf Coast refineries.

Despite Obama's efforts, 11 Democrats brushed off Obama on the vote and sided with Republicans.

The 11 Democratic defections were Sens. Max Baucus (Mont.), Mark Begich (Alaska), Bob Casey (Pa.), Kent Conrad (N.D.), Kay Hagan (N.C.), Mary Landrieu (La.), Joe Manchin (W.Va.), Claire McCaskill (Mo.), Mark Pryor (Ark.), Jon Tester (Mont.) and Jim Webb (Va.).