Don’t forget government employees and their families, college professors, brain-washed college students, wealthy, guilt-ridden people, OWS types and aging hippies, and reflexive ethnic voters. The dumb freeloaders can get them near the top in combination with those, and then the fraudulent voters make the difference in the tight races.
The kinds of people you mention are the key to Obama’s reelection. Average citizens may be too confused to stop his reelection too.