"Revoke their statehood, declare them a territory and replace their 53 congress critters and 2 senators with one non-voting delegate to represent them in the House, the same as Guam or American Samoa. As collections of counties (the more conservative inland ones) get their fiscal act together, let them reapply for admission as separate states. The lawless left wing areas can remain a U.S. territory until such time, if any, that they do the same."
Some of the southern states thought the same of Lincoln and Grant. Nobody is calling for crushing them, simply for recognizing the reality that California values are no longer compatible with American values and the illicit leadership needs to be changed to bring them back in harmony with American values.