Under the law that applies to Ted, he is required to have 5 continuous years of US presence between the ages of 14 and 28, in order to keep his citizenship.
66 Stat Sec. 301(a)(7) and 301(b)
We have to know his presence abroad between the ages of 14 and 28 to know if he is a citizen, today.
Immigration legislation does not alter the constitutional “natural born citizen” requirement for President.