Partisanism

[Cami]

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).

[Marquetta]

Partisanship; partisan spirit.

[Kai]

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.