In a Friday, March 24, 2017 file photo, President Donald Trump announces the approval of a permit to build the Keystone XL pipeline in the Oval Office of the White House in Washington.
In a Friday, March 24, 2017 file photo, President Donald Trump announces the approval of a permit to build the Keystone XL pipeline in the Oval Office of the White House in Washington. Evan Vucci AP
In a Friday, March 24, 2017 file photo, President Donald Trump announces the approval of a permit to build the Keystone XL pipeline in the Oval Office of the White House in Washington. Evan Vucci AP