Anyone who is literate can see the distinction in Article II, Section 1, not just an attorney. If you were born before ratification of the Constitution you must be a Citizen to be President. After that, you must be a natural born Citizen.
See here:
“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...”
Okay, now define natural born citizen and show us how Ted Cruz isn’t one.