Democrat posters: Nym, BRTD, brittain, Leif, snowguy, ilikeverin, Mikado
Republican posters: PiT, Torie, Phil, JJ, Soulty
Independent posters: myself, Moderate, Conor, Ernest, Alcon
Canadian posters: Earl, Hashemite, cp, Everett, Richius
European posters: Afleitch, Jas, Lewis, Tender Branson, Hashemite, Al
Gay posters: Afleitch, Moderate, brittain, riceowl, matchu, Josh, Jamespol
Southern (US) posters: Josh, StateRights, Sensei, AHDuke, Bacon King
New England (US posters): Moderate, brittain, AndrewCT, Kevinstat
I thought of some later that fit into earlier categories. I tried to do only Americans for the political parties. I'm slow at this