Sure Obama is hiding things but what is important is the policies that is implementing. Other than the secretive meetings with congress and the shear length and complexity of the bills the American people have an idea of what he is doing. Concentrate on that instead of wasting time on trivia like his birth certificate, the time to challenge that was while congress was certifying the votes of the electors and supposedly assuring that a candidate had qualified.
He would not be able to push more policies if he was proved to be ineligible and removed from office.