.Shane. said:
It goes to the very heart of what it means to be conservative or liberal. And, by that, I mean in the most apolitical of senses.
Academics are, by nature, interested in progress, expanding knowledge, advancing intellect, etc... This is inherently at odds with conservatism.
Academics are more liberal for the same reason that bankers are more conservative. And that's the way it should be.
That said, most teachers I've come across can separate liberalism from Liberalism. Both the colleges I attended were "Liberal Arts" colleges, but the professors I interacted with were ALL OVER THE PLACE politically.
edit: 1 typo, 1 improved adjective
Furthermore...
As someone who teaches at the JC level, part-time, I can also tell you that, overwhelmingly, the people (teachers) I interact with are apolitical in regards to bringing it into the classroom. I think you'd be hardpressed to guess their political persuasion based on how and what they teach.
In other words, they are professional. What sucks is that for every 99 professionals, there's 1 idiot. And that 1 idiot is more than enough for the Rush Limbaugh's of the world to paint a completely distorted picture.