I spent about a decade getting my PhD/MS/BS in EE. I can't recall any instructors ever expressing political ideas of any sort in their official capacities, and that's both as a student and in various TA and RA positions. There must have been some side comments on politics, but I never felt any pressure associated with them.

Part of it was probably the engineering culture and personality - engineers tend to be intellectually confident and are happier disagreeing than agreeing. PC social pressure can't find a lot of purchase in such an environment.