President Donald Trump’s dramatic pause of federal grants and loans is queuing up a Supreme Court showdown over the Constitution that will test the court’s recently muscular commitment to curb executive power.

The Republican-backed candidate in Wisconsin’s pivotal state Supreme Court race says he thinks anyone convicted of assaulting law enforcement officers should serve their entire sentence.

A district court blocked Trump’s plans to freeze spending on Tuesday. That’s just the opening salvo in what could be a long court battle over presidential power.