His mother is a citizen and his father was basically absent. It doesn’t really matter where he was born. People are just grasping at straws to find some technicality that could force him out. It won’t happen.
But, if his origin of birth doesn’t match his college records about being a foreign student, then he could be in trouble for submitting false info.
The president of the USA should have his entire history, good and bad available for historians. It looks like this will be finally settled once he’s out of office, then the paper will fly. Bios will put the truth to light. I suspect, it will basically say he applied for college as a foreign student. It might even say at Columbia, there’s no record he even attended class. His grades will be C average or below. Harvard? Who knows what they’ll find.