FILE – In this March 24, 2017 file photo, President Donald Trump announces the approval of a permit to build the Keystone XL pipeline, clearing the way for the $8 billion project, in the Oval Office of the White House
FILE – In this March 24, 2017 file photo, President Donald Trump announces the approval of a permit to build the Keystone XL pipeline, clearing the way for the $8 billion project, in the Oval Office of the White House in Washington. From left are TransCanada CEO Russell K. Girling, Commerce Secretary Wilbur Ross and Energy Secretary Rick Perry. Justice Department attorneys are due to appear in federal court in Montana on Wednesday, Oct. 11, 2017 to argue for the dismissal of two lawsuits that challenged the permit for the 1,179-mile pipeline. (AP Photo/Evan Vucci, File)