Opponents of the Keystone XL pipeline are protesting on the front yard of Sen. Mary Landrieu’s Washington D.C. home Monday.

The protestors have laid a large inflatable pipeline in front of the senator's home, according to the New York Times.

On Friday, the U.S. House approved a Keystone bill by Republican U.S. Rep. Bill Cassidy that’s part of a political drama co-starring him and Landrieu in the Dec. 6 U.S. Senate runoff in Louisiana.

“I believe I have the votes to pass it,” Landrieu said of the Senate version of the bill.

The Senate could vote on the bill Tuesday.

The pipeline would bring “dirty” tar-sands oil from Canada to refineries on the Texas Gulf Coast. Supporters of the pipeline say it will create jobs and reduce American dependence on oil imported from unfriendly and unstable foreign countries outside North America.

Opponents fear it will result in increased carbon emissions, and the project has been stalled by Obama, whose approval is required because the pipeline crosses an international border.

Obama has said that before he decides on the pipeline, he wants to wait for completion of a State Department review and for resolution of a legal challenge to the pipeline’s route now before the Nebraska Supreme Court. Cassidy’s bill would effect approval of the project.

The Associated Press contributed to this report.