Well, barely 50% did (last time I checked it was 50.03% Obama.
The good news is that in about one-and-a-half to two years or so from now the Obama sheeple will learn what a mistake they made. The bad news is, we'll be suffering the same way at the same time.
Look at the articles. Exit polls where people still buy the blame-Bush garbage. Believing the lies about Romney at Bain and the lie that he's all about the rich. The naive illusion that hitting the rich with a tax increase will mean nothing more than that they'll have to buy a smaller yacht or pass on that Matisse original at Sotheby's. Ignorance, credulity, naiveté: they're what re-elected Obama.