You don't have to be a citizen to temporarily attend school in another country. And how does Fact Check prove the photo of the one he originally provided is fake? The whole point of that page is to prove it's real. :\
If there truly was a problem, it would have been dealt with by now. If you want to attack him for his credentials and policies, feel free. But let's not turn a person away because of where they were born. Don't make me bring up the fact that McCain was born outside the US before the law that now grants him citizenship was in place. Who cares where he was born or whatever.... that condition is itself outdated. In Canada, it doesn't matter where you're born. Look at Gandhi... now for the big shocker: he wasn't American.