“I believe 1986 is year of the relevant law that makes him a citizen even if he were born in Kenya, no?”
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If the law defining what constitutes “natural born” changed in 1986, and Obama was born in 1961.
He wasn’t “natural born”, when he was born. If he wasn’t born in Hawaii, he’s not eligible to be President.
Clearly the only way to resolve this is to make Kenya the 58th state.
Indeed, in 1961 the Supreme Court of the United States specifically ruled that a person who was born in a foreign country to a mother who was a citizen and a father who was not a citizen was NOT a Natural Born Citizen.