It started with the Dems borking Bork.
Yes, I still remember, decades later, that Ted Kennedy, came out and denounced “Robert Bork’s America” as a place where women will have back alley abortions, blacks to go the back of the bus, etc.
It’s easy to say both parties are responsible for politicization of the courts. But which party started it and wanted the courts to be a “super legislature”?