You can still pretty much BS-finesse an answer to that one.
How 'bout "Why have you used, often across the years in your life, a Social Security Number that was previously owned, and was issued in Connecticut, a state where neither you nor your parents ever resided?"
I would ask him something like this: Before the 08 election you put forward and voted on a resolution regarding John McCain’s eligibility for the office of President. It was agreed by that resolution that he was eligible as a natural born citizen because he was the son of citizen parentS out of the country on military service.(I know there is more to McCain’s situation than this but I’m ignoring it for the sake of my question.) So Mr. President can you please explain to us how you, the son of an alien student who was NEVER thinking of becoming an American citizen and was subject to the crown and government of Great Britain, could possibly constitutionally qualify as a natural born citizen even if you were born in the presidential bed of the White House?
The question no one dares to ask and that he cannot answer!