There is a great novell of Wladimir S. Solowjew about this anti-Christ issue. I have read it several times.
Obama has a lot of characteristics of this figure from revelation.
But the real anti-Christ is much smarter than Obama. He would not engange in Islam or black supremacism like Obama did.
On the first view he would represent only good even for believers.
This figure has to be so convincing, that even the vast majority of Jews would accept him as his leader in addition to the Christians, althrough he would not hide his opposition towards G-d.
Obama has not this potential. I heard some speeches about theological issues of Obama. They were with a lot of good will very wadable.
Of cause Obama rebells against G-d, but it is more like a little petulant child, than a demonic force.