U.S. Border Patrol Chief Mark Morgan has reportedly left the agency a day after President Trump signed an executive order to build a wall on the Mexican border.

The Associated Press report, citing current and former U.S. officials, said Morgan was no longer in his post, though it was not clear if he resigned or was asked to leave.

Trump promised during his presidential campaign that he would build a wall on the Mexican border and that Mexico would pay for it.

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In signing the order, he fulfilled part of the pledge, though it does not appear that Mexico will pay for it.

“This is a law enforcement agency,” Trump said during his announcement following the order during a visit to the Department of Homeland Security on Wednesday.“But for too long, your officers and agents haven't been allowed to properly do their jobs.

“From here on out, I'm asking all of you to enforce the laws of the United States of America. They will be enforced and enforced strongly."

Mexico's president has canceled a planned meeting with Trump because of Trump's actions on the border.