US states cannot, under current federal law, go permanent daylight time (they can go permanent standard time, though), and they can't unilaterally make the latter have the same effect as the former by simultaneously switching time zones because they can't switch timezones without approval of the federal Department of Transportation. I don't see the current federal government making special accommodation for California, Oregon, or Washington on, well, anything in the next eight months, so...
I actually agree on how unlikely it is but the wildcard is Trump. I mean, he is the kind of guy who just goes with his gut and he has already publicly supported getting rid of the time change, calling it a "50-50 issue" (on which to go with, standard or savings).
The worse case is he pushes a federal change to standard time, in which case I suspect BC would have to go along.
