From dailymail.co.uk:
The Department of Homeland Security has asked U.S. Border Patrol Chief Mark Morgan, a former longtime Federal Bureau of Investigation agent, to step down from his post.
News of his departure, expected within a month, comes as the Trump administration moves toward tougher enforcement of immigration laws.
Two sources familiar with Morgan’s departure told Reuters that he held a morning phone call with employees to say that he was not resigning – but had been asked to leave by the Trump administration.