The U.S. Supreme Court has allowed presidential power to steadily expand in recent decades. Now the court may review Trump administration efforts to expand executive branch authority.

President Donald Trump has expounded an extraordinary vision of his authority over the past month, relying on the Supreme Court’s decision last year granting him immunity from criminal prosecution, as a blank check in his broader drive for power.

The case involves major constitutional questions about presidential power—but its unusual posture could make it a dud.