No court ruling is possible. The text of the Constitution is supreme law. The states cannot be forced to choose one way only to select electors.
-PJ
Unfortunately, the Constitution now says whatever the hell five out of nine Supreme Court Justices want it to say at any time.
I have no doubt they can find an Obama appointed district judge to rule their way and maybe get the 9th Circuit Court of Appeals to go along, but I doubt they can convince 5 of the current Supreme Court Justices to go along. It is close though. The four far left-wing liberals on the Court will go along with anything that keeps liberals in power.