Natural born to be eligible to be President of the United States per the Constitution. It is not settled law. If it were, we would have never had the Chester A. Arthur controversy, Obama’s place of birth issue, or the Senate feeling the necessity to issue a non-biding resolution in 2008 finding McCain eligible to run.
Obama’s place of birth is relevant because NEITHER of his claimed parents could transmit citizenship to him.
If Obama was not born in the U.S., he is an ILLEGAL ALIEN.
And there is no evidence he was born in the U.S.