Trump Tests His Sway at Supreme Court in Push to Oust Official

Donald Trump is already testing his sweeping assertion of presidential power with the US Supreme Court, which just a month into his new term is poised to say whether he can fire the head of a federal whistleblower agency.

Asking the justices to take the unusual step of intervening in a just-filed lawsuit, Trump says the court should lift a temporary restraining order that shields Hampton Dellinger for 14 days from being ousted from his position at the US Office of Special Counsel. The court could rule on the request as soon as Wednesday.

The clash will offer an early ...