Communism SHOULD BE illegal. And the Constitution is very clear. Private property, even to the extent that too many early ratifiers were willing to set the stage for war by claiming that people were property. Representative, unlike Commie dictatorships. Checks and balances, unlike Commie tyrannies of rigged courts, rubber stamp assemblies, and armies of Gestapo and secret police. Etc.
Perhaps this guy would run screaming from the room if someone pointed out something so obvious - NAH- NAH - I'M NOT HEARRRRRING YOU! AAAAH! And then he'd turn at the door, and Gollum-like, hiss and sneer, Racccissssst! Homophobe! I'll get you my . . etc.
I could be wrong. I wonder, though, if the kids going to this unfortunate backwater don't have such nightmares as they anticipate this guy's next quiz, and the basis or standard for his grading? I don't know.
The Constitution of the United States
Article IV, Section 4:
The United States shall guarantee to every State in this Union a Republican Form of Government, and shall protect each of them against Invasion; and on Application of the Legislature, or of the Executive (when the Legislature cannot be convened) against domestic Violence.