Partisan
Part of speech: adjective
Definition: Adherent to a party or faction; especially, having the character of blind, passionate, or unreasonable adherence to a party; as, blinded by partisan zeal. Devoted to or biased in support of a party, group, or cause: partisan politics. Serving as commander or member of a body of detached light troops: as, a partisan officer or corps.
Part of speech: noun
Definition: An adherent to a party or faction. A fervent, sometimes militant, supporter or proponent of a party, cause, faction, person, or idea. The commander of a body of detached light troops engaged in making forays and harassing an enemy. Any member of such troops. A spear with a triangular, double-edged blade. A soldier armed with such a weapon.
Example sentence: Let me start by saying that I do not enjoy nor relish the partisan role of attack dog. I never found any fun in that. I don't think it's constructive. I don't intend to become that here in the Senate.
Tendentious
Part of speech: adjective
Definition: Having a tendency; written or spoken with a partisan, biased or prejudiced purpose.Implicitly or explicitly slanted.