Despite the fact that it’s unconstitutional.
Via Daily Wire:
On Tuesday evening, US District Judge John Bates ruled that President Trump could not legally end the Deferred Action for Childhood Arrivals program, arguing that Trump would have to begin reissuing temporary visas again. He called the decision to end DACA “arbitrary and capricious because the Department failed adequately to explain its conclusion that the program was unlawful.”
So, in other words, if a president takes an executive action, then the subsequent president cannot undo that executive action – even if that original executive action has been declared unconstitutional, at least in part.