At least one Freeper has mentioned this as a possibility.
I think there is a possibility that Trump is saying this so as to open the door to 0bunghole’s non-eligibility. Things I’ve heard Trump say recently in a Wolf Blitzer interview, and a rally speech, and the fact that he was the one who brought up “No birth cert” and got 0bunghole to release the forged one. And a couple other things....
In 2008, Jack Cashill implied the most likely place of Obama’s birth was in Canada. Obama’s mother’s aunt lived just across Canadian border. The aunt lived near a private home for unwed mothers. That would have solved the issue of travel between HI and Washington state.
Stanley Ann was seen in Portland with a very young baby, soon after she gave birth. Soon enough she did not know how to change him.