Can Mary Landrieu get to 60 votes on Keystone pipeline?

Every Republican in the chamber is expected to vote yes, meaning 15 Democrats must support it to reach the threshold of 60, which would cut off a filibuster by opponents.

Ten Democrats have joined Landrieu in co-sponsoring the legislation approving the pipeline: Sens. Joe Manchin (W.Va.), Kay Hagan (N.C.), Heidi Heitkamp (N.D.), Mark Pryor (Ark.), Claire McCaskill (Mo.), Jon Tester (Mont.), Mark Warner (Va.), Mark Begich (Alaska), Joe Donnelly (Ind.) and John Walsh (Mont.).

That leaves supporters needing to win four more votes to reach 60.