The Senate Energy and Natural Resources Committee passed legislation mandating construction of the Keystone XL pipeline Wednesday in possibly the last Senate action on the Canada-to-Texas project before the November midterm election.

The measure secured a 12-10 vote, with two Democrats — chairwoman Mary Landrieu, of Louisiana, and Sen. Joe Manchin, of West Virginia — joining Republicans to approve the bill. Notably, Sen. Mark Udall, D-Colo., facing competition from Keystone XL supporter GOP Rep. Cory Gardner for his Senate seat, voted against the bill.