And, by way of a clue, I submit the title of this thread: “Ted Cruz Not Eligible To Be POTUS, According to Most Plausible Interpretation of Constitution”
Is Ted Cruz a citizen? That is undoubtedly correct. And personally, I believe it is clear that Cruz is constitutionally eligible. The intention of the “native born” clause was to ensure that we do not elect someone with divided loyalties, and I do not believe that anyone can reasonably assert that Cruz owes any allegiance to Canada. That there is any further debate about his eligibility for the presidency is clear evidence that you are incorrect.
That statement gives you away. You say you do not believe that anyone can reasonably assert that Cruz owes any allegiance to Canada. The eligibility clause does not say that each candidate must be tested to find out if it can be reasonably asserted that they owe any allegiance to another nation. The Constitution was written to exclude a group of citizens that might have any possibility of a divided allegiance. We do not even get to test Ted Cruz because he is already not eligible.