“To have standing, you have to be able to articulate an injury that you will suffer that is distinct from a generalized claim of injury to the public at large...”
What if you had donated to Cruz and then find out he’s not eligible and that he knew it? Would you not have suffered a specific injury not generalized to the public at large?
For that to be an injury suitable to get in front of a court, the issue of his eligibility would already have to be settled, and the outcome go against Cruz. Otherwise, any injury is still speculative.