California must maintain control over the thought processes of their massive population so that they can continue to be somewhat competitive in Presidential races. Democrats have been all but rendered extinct in the rest of the country and they only boast a few pockets of significant numbers in the country. They are a pariah and don't even know it. It reallly is no surprise that they have taken a bigoted approach toward the rest of the country.
Democrats will come back guaranteed. Especially after a few years of republicans screwing things up. Then of course dems will screw things up like before. This switching back and forth has been going on for decades. However, could republicans make another comeback like they did this time around? I don't think so with all the minorities and the nation's very young coming of voting age. This will force republicans to become a little more all inclusive and work for the average citizen, which they don't do now. clinton and the dnc screwing over Sanders was a gift to the republicans, and I don't think democrats will make that mistake again.