Donald Trump is no legal scholar, but at Wednesday’s presidential debate he showed a superior grasp of the U.S. Constitution than did Hillary Clinton. Amid the overwrought liberal fainting about Mr. Trump’s bluster over accepting the election result (see below), Mrs. Clinton revealed a view of the Supreme Court that is far more threatening to American liberty.

Start with her answer to moderator Chris Wallace’s question about the role of the courts. “The Supreme Court should represent all of us. That’s how I see the Court,”...