Im not a lawyer. What do those terms mean?
Ex post facto means after the fact. It is in the Constitution to prevent the passage of laws that make a status OK when it wasn't at the moment of truth (but I think it was especially intended to prevent the gov't from criminalizing after the fact something that was legal at the time -- but the principle applies either way).
The Bill of Attainder provision is to prohibit the govt from making a law the intent of which is obviously specifically address one particular individual's situation.
Any attempt to address the natural born citizen provision at this particular time would be arguably over the line on both provisions.
But then, the Constitution means nothing to liberals (unless they can find a clause that advances THEIR pet causes).