Don't be absurd. The majority of the people don't vote either on facts or on issues as a whole because few people take the time to really understand the issues. How many people still read a news-paper or news weekly?
That's why you have voters screaming at town-halls that they don't want a government-controlled health care system yet also scream, "keep your hands off my Medicare". It's why half the country is convinced that you can fight two wars, reduce taxes and not touch social security for current retirees, yet still reduce the deficit. It's why people believe that somehow, with a different President or different Party in charge, suddenly manufacturing jobs are going to return to the U.S. Or that any President's policies are going to find lots of well-paying jobs for totally unskilled people. We (and our politicians) live in a fantasy world.
I believe I've seen reports that 50% of citizens cannot name the Vice-President and more than 70% can't name the Speaker of the House. I just saw a report that claimed that 6% of the country believes that Lee Harvey Oswald killed Abraham Lincoln. We're a nation of idiots. When Jay Leno goes "Jaywalking" (and although I'm sure they edit out the unfunny people who actually know something), you'll find people who can't tell you who we fought in World War II or the century in which the Civil War was fought. He finds people who can tell you every obscure fact about Lady Gaga and are wearing the very latest fashions and have the latest phone, but they don't know how many states there are in the U.S. (never mind actually naming them).
As for independents, can one claim to have not made up their mind yet when the candidates have such opposite view on every issue? The only people who haven't made up their mind yet are people who vote on personality and image and not on the issues. It seems to me that if it weren't for people who have no idea what the issues are and where the candidates truly stand, elections would actually be decided as soon as the primaries are over.
The majority of people vote on three word headlines, imaging, conventional wisdom and "feelings". Gore didn't lose on the issues (actually Gore won the popular vote, so he didn't really lose at all), he lost because the media decided he was a wimp. If Obama loses, it won't be because of the issues or the reality of his performance in office, it will be because of his weakness in the first debate, since he was way ahead before that debate.
Furthermore, a great many people vote against their own self-interest (and not in the name of doing what's right for the country either). That's why middle-class voters vote for Republicans who reduce taxes on the rich by a great deal and reduce taxes on the middle-class by an infinitesimal amount and Wall Street generally hates Obama in spite of the fact that he continued Bush's bailouts and the DJIA was 8776 a few days before Obama took office and is over 13,000 today.