This is a point that most faithers don't seem to understand or want to admit. Most of the damning evidence that Obama committed fraud and is categorically ineligible came out AFTER he was clumsily sworn into the office he occupies. This also destroys any notion that Obama was properly or fully vetted prior to the election results being verified by Congress. Timing is everything, and Obama managed to use it to his benefit and fool a LOT of people ... and I mean a lot.
Of course he was not properly vetted. Its not currently required. You have to produce more documents to get a drivers license that you do to become a candidate for President. Party hacks just sign a piece of paper, and in most states it doesn't even have to say that the candidate is eligible. That's why Obama is the legitimate President: he met all of the requirements.
If we had been diligent, we would have years ago adopted rules requiring examination of documents. But we didn't, and now we have this mess. So, fix it. Require the presentation of qualified documents and certification by each Secretary of State that they are original, proper, and substantiate the claim that the candidate is eligible. The candidate's minions can march up to each state capitol, stage a little ceremony while presenting the document, and walk away with a seal of approval. The demands of the Constitution will have been met. No way to dial back the clock, unfortunately.