Senate Democrats are considering scheduling a vote in the lame-duck session to force approval of the Keystone XL pipeline, a party aide said, a move that may bolster Louisiana Democrat Mary Landrieu’s re-election battle.

The Senate Democratic aide, who requested anonymity to discuss the plans, said the vote was under consideration, yet specific language hadn’t been determined.

Casting a vote in favor of the pipeline may benefit Landrieu ahead of a Dec. 6 runoff, in which she faces Republican Representative Bill Cassidy. Congress returns tomorrow for a post-election session.