There's a current theory called the "Bradley Effect"... seems, a few years ago (I don't recall which State) a black running for office in a local election was well ahead of his rival but lost by a significant margin. His name was Bradley, of course and the theory proceeds along the lines of people expressing their intention to vote for the Black person, but when actually in the privacy of the voting booth can't bring themselves to do so. Most pollsters equate that possibility to as much as 8 to 10% of the lead Obama may have. No one knows for sure, of course.
The problem is, Obama's real claim to fame (actually, the only one in my opinion) is that he delivers a really good speech. But, even then, he goes absolutely nowhere without his telepromter.
A ridiculous sight demonstrated that recently here in the western U.S., where he chose to appear, Gucci's and all, at a rodeo... you know the kind, cowboys, horses, manure... In the middle of the arena he gave a pretty good speech... using his teleprompter. He has been filmed trying to speak "off-the-cuff" and it doesn't work very well.
He's only been a U.S. Senator for about 4 years and even that was achieved through questionable circumstances. It's just, again, in my opinion, comes down to two things. This country has a guilt complex over the question of slavery, although that ended in 1865 at the cost of 500,000 American lives. The other is that the Left has done a thorough job of demonizing George W. Bush. So much so, that it's even succeeded in Europe and the U.K. The old saw about telling a lie so many times it becomes the truth has been substantiated.
It's possible Obama or someone like him could make a good President. It's just that his total lack of experience and his highly publicized associations with radical leftists is truly disconcerting...