A central function of the USSC is to resolve conflicts in judicial decisions that appear in federal judicial districts. If any of this gets appealed to a federal district court and there is a conflict with decisions at that level, I think the USSC would be very willing to step into it.
if the federal courts won't touch this - that essentially means that a state court can use its political will to wipe out the equal protection laws within the bounds of any statewide election. they could issue any ruling related to an election to reach their desired outcome, and there isn't anything anyone can do about it.
I just worry they're too gun shy after 2000 to get involved.
Under something called the Rooker-Feldman doctrine, a civil case that was heard in a state court cannot be appealed to any federal court but the Supreme Court. So this decision is final unless the Supreme Court agrees to grant certiorari.