I don’t see how the supreme Court has jurisdiction over the candidate selection process for either party.
The VP candidate is picked by the presidential nominee in both parties, so I don’t see why Trump changing his pick should be an issue (other than to confirm 100% that he has 0 loyalty and waffles on even the most trivial issues).
That’s already confirmed 100%. The bus has bounced so quickly over so many former allies that it placed first in a lowrider hydraulics competition.