Do you agree that the Senators improperly threatened the Supreme Court? Could not one argue that Senators informing the Court that it had become out of synchronization with the country, would mean that they, the Senators, felt they had an obligation to restructure the Court. They made no suggestion that the restructure would be brought about by anything other than Constitutional means. Congress has the authority to pass legislation to amend the Constitution and submit it to the states for ratification. Why would a statement that they might do such a thing, exercise their Constitutional authority, constitute a threat?
Or is this something Tony Soprano (I assume you know who Tony Soprano is), would be proud of, a strong suggestion that if you do not do what you are told, you could get hurt?