[telotortium]

There would definitely be people who could argue standing, however. You could start with their opponents in the general election. More likely I think would be their primary opponents (probably initially at the state level). The Supreme Court could attempt to evade this by calling it a political question outside of the court's jurisdiction (they've done this in denying challenges to gerrymandered maps, although those are different in being acts of the states, rather than contesting an irregular election), or they could in theory deny cert and let a lower court's decision stand, although I think that's unlikely.

(IANAL)