CTguy,
Firstly, only 15% of Asians vote. So it's kind of silly to say that most Asians vote Democrat because the ones who did vote voted Democrat.
Though it's true that probably most graduate-educated people are liberal, that doesn't make liberals "better educated" than conservatives. Their intelligence balances out with all the less educated people- hispanics (70%) and blacks (85%) usually vote liberal, and they arn't very well educated people. That's 30% of the population right there, and about 1/3 of the democrat's population.
So no, liberals are not usually 'better educated'.
There is a difference between Liberal and Democrat. The 70% of hispanics and 85% of blacks that are voting democratic are not doing so primarily because of social issues or because they are liberal. They are doing so because democratic policies benefit them economically.
If you control for this, most people who vote based on ideology that are educated are liberal while people with less education tend to be conservative. It doesn't take a rocket-scientist to see that many of the precincts Gore won in 2000 were college towns or areas around cities where people hold advanced degrees. Whereas most of the vast rural expanses that Bush won are culturally social areas where most people didn't go to college.