In this Jan. 22, 2020, file photo, Night falls on the Supreme Court in Washington. The Supreme Court is about to tell President Donald Trump whether he has more power to use a favorite phrase: “You're fired.” A case being argued at the high court Tuesday could threaten the structure of agencies that form an enormous swath of the federal government. It has to do with whether Trump, and future presidents, can fire the heads of independent agencies for any reason.