One of two things that George Washington warned us about before retiring and everyone completely ignored him instantly. Few people realize that George Washington warned America not to form political parties, only nobody listened and here we are, lost in perpetual gridlock.
He also warned us about forming permanent alliances with foreign countries(e.g. NATO and UN).
Worker #1:"Hey, you registered as a Democrat or Republican?"
Worker #2:"Neither. I'm registered as an independent. Partisanism has to be the worst idea since the electoral college."
Like racism except that the person assumes something about someone due to their political beliefs instead of race. Someone who does this would be a partisanist.
Republicans who assume all Democrats support Obama's policies are guilty of partisanism.