WASHINGTON — The Republican-controlled Congress is set to send a bill approving the Keystone XL oil pipeline to President Barack Obama, who has vowed to veto it.

The House is expected to pass the bill easily today, capping weeks of debate over one of Republicans’ priorities — a bill authorizing the construction of the much-delayed pipeline. Yet support in the Senate and House has not been enough to override a veto.

The pipeline has exposed larger divisions between environmentalists concerned about potential oil spills against supporters who argue that the project will create jobs. One of the measures added to the bill by the Senate states that climate change is not a hoax, which could make some conservative Republicans think twice.