There's supposed to be more than one AntiChrist, but I don't believe Barack Hussein Obama is among them - as others have already pointed out, he would have MUCH more charisma and be able to think on his feet MUCH better - and he would've done MUCH better in fundie-heavy WV and other places, if he actually was The Beast.
I seriously doubt that if you stripped him naked, you would find the numbers "666" anywhere on his skinny ass.