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. Amid staff turmoil and shake-ups, travel bans blocked by federal courts and the Russia cloud hanging overhead, Trump is plucking away at another piece of his agenda: undoing Obama. (AP/RSS Photo/Evan Vucci)