That's essentially Ted Cruz's legal situation. He was born on December 22, 1970 in Calgary, a city in the Canadian Province of Alberta, to an American mother and a non-American father. While he may have been eligible for U.S. citizenship at birth, he was also a natural born citizen of Canada and a subject of the monarch of Canada, Queen Elizabeth II. He says he renounced that citizenship, which he claims he didn't know he had, in 2014.
But how do we know where his true allegiances lie? The Constitution doesn't take any chances:
"No Person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President; neither shall any Person be eligible to that Office who shall not have attained to the Age of thirty five Years, and been fourteen Years a Resident within the United States."So where does that leave Rafael Edward Cruz, or Edward IX as I shall now call him? It leaves him waving his mother's birth certificate to prove his natural-born citizenship, not his own, the one that proves he is not eligible.
He can run for President, there is no Constitutional prohibition on running just on eligibility to serve. If he wins, I suppose that Edward IX could serve as a kind of faux President in the figurehead style of current European and Canadian monarchs. So long as his Vice President meets the Constitutional requirements for the Office of President and countersigns all of Edward IX's official acts, who can complain? Well, everyone can complain, we all know that.