Simple: he speaks his father's native tongue. Obama is the natural son of the father of lies.
Obama's natural habitat is the pitch blackness of the abyss, where an eviseral hatred of Truth is as normal as mom, baseball, and apple pie is to us. It's the place where sunshine must never enter, lest the light expose the wretched nature of the inhabitants' souls (not to mention the ecosystem of slime, mildew, and filth).
This "POTUS" belongs in our beloved White House as much as fish are at home in a tumbleweed.
Ding, ding, ding!! We have a winner. This is the comment that I'd been waiting for.
Obama lies because the truth is not in him.