You can't? If that's the case, it's a crime beyond comprehension that Romney didn't file while he was running. And add to that, didn't McCain get something done in the US Senate that spelled out that because he was born on US controlled military territory, he was eligible?
I really don't get it why someone else running for that office wouldn't have standing.
They might. If Trump is serious, he should sue - he has as much chance of having standing as anyone. But even if he has standing, the court might not consider the issue "ripe". But he'll never know unless he tries. Heck, if he really believes Ted is not eligible, isn't it his DUTY to sue and prevent the possible nomination of someone ineligible?