At birth, he was qualified to receive a Consular Report of Birth Abroad, as authorized by statute under Congress' authority to make an uniform rule of naturalization.
Whether he did or did not receive a CRBA in a timely way or not is unknown. His campaign posted his Canadian birth certificate, so far, I don't believe we've seen his CRBA.
It is most certainly NOT a resolved issue (and it may be unresolvable) whether the son of an alien father born abroad is an NBC. If there is a way to resolve it, the GOP should move promptly to do so.
But there may be no such path to resolution. The courts decide "cases and controversies", they don't generally respond to requests for clarification and they don't issue declaratory judgements without a plaintiff or injured party. It's not clear that there is such a person here.
Status quo Yeb.