I'm confused, probably because I'm not American, but what are the major personality differences between Lib and Dem? (I mean what distinguishing features or characterisations pigeon-hole William Peck as a Liberal)
William Peck's character was the Hollywood Standard A-hole in a Suit . The authority guy, who the protaganist must overcome. These are always white, heterosexual, and possibly conservative. The only difference was that in Ghostbusters, William Peck worked for the Environmental Protection Agency, which would be a liberal redoubt in the Federal Government. Peck was full of himself and his authority, which, however, was used to protect the environment. So, basically, he was a standard conservative AHIAS, but worked for the EPA and thus conceivably, was liberal.
No other example exists in any Hollywood movie of any liberal villian. 100% of the time, the villian is clearly identified as a likely conservative or Republican.