A federal judge said Gwynne Wilcox must remain at the agency that oversees relations among workers, labor unions and employers, setting up a Supreme Court showdown over presidential powers.

A federal judge in Washington ordered the Trump administration to reinstate a member of the National Labor Relations Board on Thursday, finding her firing without cause violated federal law. Trump officials in January fired Gwynne Wilcox,

President Donald Trump’s firing of the former chairwoman of the National Labor Relations Board was an “illegal act,” a federal judge ruled Thursday, overturning her ousting in a decision that was highly critical of Trump’s “intent on pushing the bounds of his office.