Neither are things like "speech" or "privacy." We go to what the founders intended so we do not have Congress redefining our rights away. That's constitutional conservatism 101.
So instead, we rely on the US code and various acts (such as the Naturalization Act of 1790) to determine intent.
And that intent rules Ted Cruz out as an eligible candidate for President, including the 1790 naturalization act.
False.
Deal with it. He is a citizen.