partisan

CEFR: C1-C2 /par-ti-san/ [p.aa1.r.t.ah0.z.ah0.n]

Definition: strongly supporting a group or point of view

Example Sentences:

The new talk show taught us more clearly than professors and politicos how partisan democracy can so easily be tarnished by selfish, corruptible whims.

Partisan political infighting caused Congress's influence to decline.