one-sided, partial, unfair, slanted, partizan, partisan, colored, prejudicial, discriminatory, prejudiced, more...

impartial, neutral, objective, unbiased, fair

liberal, conservative, left-wing, right-wing, pro-life, pro-choice, pro-death penalty, pro-gun control, more...

skill, urban, male, own, forward, self, gender, less, female, more, rural

clouded judgement,   not objective,   favors one side,   inclined towards,   not impartial,   leans one way,   heavily inclined,   wasn't neutral,   oriented towards,   not neutral