Why did not Cruz cite the Constitutional law that he is eligible? Because he cannot. There is no question about Trump’s eligibility. And Cruz knows that. Questioning Trump’s natural born status was a deception and shows Cruz to be a fraud. Some may think it is no big deal because Cruz says what they want to hear. But I am not among those who think it is conservative values to flaunt the Constitution.
Because the Constitution does not define natural born citizen. The U.S. Statutes define it and since Cruz had one U.S. Citizen as a parent, he is considered to be a natural born citizen.
Why don't you research the law of nations and the common law that existed at the time of the passing of the Constitution. If you actually did the research, you'd find some interesting things.
Trump's mother was not born in the U.S., yet Trump claims there is a difference because he was born on U.S. soil. If you insist on looking at the Constitution, point to the provision that makes him a natural born citizen. You can't.
Show me where Cruz questioned Trump's natural born status. He didn't. He was simply stating that based on Trump's own logic, Trump would also be unqualified if Cruz was unqualified.