The Libtard Socialist majority will never allow a breakup of Kalifornia... the democrats want those 51 Electoral Votes going to a socialist. Any breakups whether in the north (Jefferson) or south San Diego region counties would be pure RED it would be a super advantage for the Republicans (2-4 more GOP/IND Senators plus the congressional districts). California Democrats would never allow this.
Imagine the prosperity if there was a succession and they had small low cost goverment and 0% state/corporate income tax? Businesses would flourish to the newly formed states. Hell, Amazon.com would be back in... port of trade with the far east.
It would be a major decay of the socialist ruled remnants.