This study examines political bias in mainstream media, investigating how media outlets influence public perception of political events through selective framing, language use, and ideological representation. Utilizing a qualitative approach, the research combines content analysis, interviews with journalists and media consumers, and surveys to uncover patterns of bias in both traditional and online media. Findings reveal that media outlets, depending on their political orientation, frame political issues in a manner that reinforces existing ideologies, selectively highlight certain aspects of political stories, and use biased language to shape public opinion. Additionally, the study finds that media bias significantly contributes to political polarization among consumers. The research highlights the role of media ownership, corporate interests, and the growing influence of online platforms in shaping political discourse. Based on these findings, recommendations are made to promote media literacy, encourage more balanced reporting, support independent journalism, and develop tools for monitoring bias, with the goal of improving public access to objective and impartial information.