The Federal Government funds >90% of California's medicaid expansion which is the vast majority of newly-insured people under the ACA. 1 in 3 Californians now receives free health care under Medi-Cal, California's medicaid program. If the Feds withdrew medicaid expansion funding I don't think California could afford to keep it up themselves without extremely painful tax hikes (which it may already be slating for future pension bailouts).
1 in 3 Californians now receives free health care under Medi-Cal
Look at that again, people. That's not just subsidized coverage; it's free coverage, for over 13 million... and that was before adding free coverage for those here illegally.
Does this strike people as a long-term sustainable model?