A federal judge on Wednesday blocked President Donald Trump's asylum ban at the U.S.-Mexico border, saying Trump exceeded his authority when he issued a proclamation declaring illegal immigration an emergency and setting aside existing legal processes.

A federal judge blocked a Trump administration policy barring migrants who cross the US-Mexico border from seeking asylum, issuing a major blow to President Donald Trump, who has sought to seal off access to protections on the border.

The ruling is a setback for President Donald Trump, a Republican who recaptured the White House promising a vast immigration crackdown.