The lawsuit over Obama was started by a lawyer sympathetic to Clinton. Here is one view of the birth certificate issue. In the end, if you are born here, you are born here. You do not ever lose that unless you revoke it as an adult. McCain was born in the Canal Zone. I think the same applies to anyone born to an illegal immigrant. If they move back to where they came from, the child born to an illegal can get US citizen if they want when they become an adult. It is called beachheading. How illegals can create legals....
Now, as we know about law and lawyers, politics can be involved in legal rulings but then we have the appeals, etc.
FactCheck.org: Born in the U.S.A.