The Supreme Court will rule that President Donald Trump has the power to fire independent federal agency heads.

The Trump administration has shuttered, fired or targeted for resignation individuals, offices and agencies that could serve as a check on President Trump. Supporters say that is exactly the point.

Trump also forced out Ellen Weintraub, the chair of the Federal Election Commission (FEC), which has oversight over Trump as a candidate. The FEC chair was vocal in pushing back against Trump’s ...