First thing they'll do is try to discredit Trump's character (but they can't do anything about the BC now, can they?).
You bet they're scrambling for a way to answer Trump, but part of the reason they're scrambling (and being very quiet at the moment) is because Trump isn't someone they can easily attack or discredit.
Hate to paint a gross picture, but there are a lot of sphincters squeezed so tight in the White House right now, they're literally bleeding.
They don't have any honest way to answer Trump's challenge except to release Zero's official, state-issued long form birth certificate, which they more than likely CAN'T do.
Trump has the White House backed into a corner that they have no way of getting out of. He's just busted Obama's fraud wide open, and there's not a damn thing they can do about it.
Nothing short of releasing an authentic long form birth certificate, which can be verified by expert document examiners, will end this. Even that's not really enough, because the ignoramuses in the MSM have opened the NBC Pandora's Box, by challenging Trump's mother's citizenship status.
There is literally no way out for Obama. He's trapped.
“trapped” and negotiating? Remember, Trump does deals.....
The Big Boo