You know what the Bible warns us of before it warns us of 'the beast'? "Beware of false prophets."
I believe I know exactly to whom the number refers, but the truth isn't interesting enough to those who want to find secrets undiscoverable by anyone else. (If you torture the numbers and letters enough, you can find 666 in anything, just as this author did, but not a single other person would have discovered the same thing on his own.) The worst thing about this interpretation is that it fails to fit the context of the book from which the number comes, but that doesn't matter to modern day prognosticaters who can find anything they want in the Bible. Just ask Hal Lindsey about that. He was an expert on prophecy back in the last century, until he was proved wrong by current events.
Current events will prove this prognostication wrong too. Obama is many things that I oppose, but I won't invent things just to make him worse that he already is. I'll leave that to those who have their noses in the air.