ORIGINAL: GRIZZLYMAN
Nah, teachers. It doesn't matter if they are liberal or not, their union is. That's the people that push the agendas of PETA, Humane Society, ACLU, et al.
Teachers do seem to have a propensity for promoting the anti gun, AR positions, and other liberal phony enviromental crap but I've never seen anything to indicate it is a result of the union.
Maybe it's their dentists that make them do it?
Could be their insurance agents or ministers.