Although Trump’s mother was born in Scotland, she was a naturalized U.S. Citizen at the time of Donald’s birth.
If I had to guess, Tulsi Gabbard. True, she isn’t an Art. II, ยง1, cl. 5 natural-born citizen, but Trump might pull an Obama when he put in Kamala Hassis as Biden’s VP. That would kill two birds with one stone. First, it will allow for all times anyone born a U.S. citizen to become president, allowing his offspring to run for the presidency. And secondly, she might bring in a sizable amount of Independents to the ticket.
Tulsi’s parents were both American citizens when she was born.