Cruz should win in Iowa, Trump will have suffered “injury-in-fact†(direct not indirect injury) which is a requirement of standing,
The “injury-in-fact†will have been perpetrated by the voters, not Cruz. Maybe Clyde Barnum Trump will sue the voters.
Voters don’t have standing. Their “injuries” aren’t particularized. They’re general.
Money is injury. Trump has spent money campaigning against Cruz. If Cruz is ineligible, Trump’s campaign money has been stolen from him by Crua’s candidacy when ineligible.