Don't worry I'm about to as conservative as they come.
There isn't as much liberal brainwashing going on in non liberal arts programs, at least not at U of D. The only bit of bias I saw was from an oceanography class I took to fulfill an elective requirement, the lady was very anti coal industry.
Almost bit clean through my lip that semester, but it's kind of hard to argue with a professor when they hold your GPA hostage. So much for the free exchange of ideas.