"From the start, Morgan clashed with the Border Patrol's union, which had advocated for an insider to lead the agency and sharply criticized Morgan at almost every turn.
The union was incensed when Morgan, at a Senate hearing Dec. 1, said he supported a comprehensive immigration overhaul, which is often interpreted to include a path to citizenship for people who are in the country illegally. Morgan clarified his remarks in a note to Border Patrol staff the following week, saying he does not support a "blanket amnesty."
The union, the National Border Patrol Council, has had a strong relationship with Trump. It was so enamored with his stance on security that it took the unusual step of endorsing him during the campaign. The endorsement was a leadership decision and not decided on by a unionwide vote. Union chief Brandon Judd was part of Trump's transition team.