I think the immunity ruling of yesterday ended the U.S.'s checks and balances against a King, Monarch, or in more modern terms, the Unitary Executive. Overturning Roe Vs. Wade was the Judicial Branch warning shot.
I predict that in the future the U.S. will have a new revolution, but it'll probably be at least a century away. "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."