Because he had a Kenyan father.
It sure took a very looooong time for him to admit his Kenyan citizenship. Is this guy trustworthy? LoL! So did Obama have a Indonesian citizenship at the same time he held a Kenyan citizenship? What’s the truth here? Obama was the only person who was born in two different Hawaiian hospitals at the same time. Wow, a great trick! However, grandma Tute says Barack was born in Kenya LoL!
So hey, when can we ever expect a straight answer from this guy running for president? Oh I forgot, Dems who run for president can lie with impunity.