Democratic U.S. Senator Chris Van Hollen said on Thursday he met Kilmar Abrego Garcia, a man wrongly deported to El Salvador by the administration of Republican President Donald Trump.

President Donald Trump has been testing the boundaries of his authority over US immigration policy since he began his second term of office, but he hinted at taking things to a new level when he said he’d support deporting US citizens to a prison in El Salvador.

The President escalated a fight with the Supreme Court over a wrongfully deported man, proposing to send U.S. citizens to El Salvador next.

A federal appeals court says it is “shocking” that The Trump administration claims it can’t do anything to free Kilmar Abrego Garcia from an El Salvador prison and return him to the U.S. A three-judge panel from the 4th U.