I think the real reason his BC was kept secret was that Frank Marshall Davis is his real dad. Just a thought.
Massive research was done by a team, a good deal of which was posted on FR as ongoing threads, and his place of birth is known and parentage. FMD is not his father. If the researchers some of whom were freepers know, then obviously Trump and his team know.
0bola is not only not a natural born citizen, he’s not a citizen of the US at all.