after the brexit was initiated and Trump won the presidency in the US, Calexit became a trend, California contributes 13% of the GDP which is the biggest contributor. If the federal government misusing the money from California, Calexit will happen. The same what happen in Britain they cut the chain, because they learned the lesson from what happen in the Greece economic crisis, they know that union is a zero sum game only Germany, France will benefit from the union, so it's better off cutting the ties.