The claim is not dubious. It is amply demonstrated.
Not to me. We have no reason to believe its not real. I’ve read the commentary on why its not. Its simply not convincing and not relevant even if it might be true.
Of you want to prove Obama a liar, it’s a lot easier to point to his brazen broken promise on campaign financing. Obama is starting to tell lies with great rapidity. Just not about where he was born.