What equivalent facts do you have for any other president? Let's pick one. How about Garfield. What you got on him?
Anyway, it's not my claim. The birther claim is that he isn't eligible. So you should be asking them for their "facts capable of being presented to a court of law".
The testimony of living credible people at the time, his parents, brothers and sisters, aunts and uncles, other relatives, doctors, midwives, and others who could and would if called upon by a court of law provide the facts of his birth and birth parents proving that he was a natural born citizen.
Where is anyone willing to appear in a court of law to testify to the facts of Obama's birth??? and in their absence where is any documentation???