Obama was never naturalized. He wasn’t eligible to run, and no one wanted to be called a racist for questioning his story. He was born in Canada to an unwed teen American who was, in 1961, too young to be able to confer her USA citizenship upon the baby she was originally going to give up for adoption. Father was not a US citizen, married with children in Kenya.
A Naturalized citizen can not run for the presidency, only a natural born citizen. He was neither, he was a fraud.