As I understand it, Forrester the candidate sought the relief. There was some argument that he did not have "standing" i.e. did not suffer individual injury (aside from $$$ spent which is not cause for an injunction). As to the other parties, I guess the Supremes did not see this as warranting emergency relief. They did not say why they refused, which is the least they could have done.
I do hope they realize that the Rats will play these games to no end until stopped. The Rule of Law means nothing unless enforced. *sigh*