Public sector **unions** play a crucial role in **political advocacy** by representing the interests of employees and influencing policy decisions. They engage in activities like collective bargaining, lobbying, and public mobilization to promote labor rights, better working conditions, and social justice. Unions often contribute financial resources to political campaigns and support candidates who align with their values. By organizing members and raising awareness, public sector unions can shape public discourse and drive legislative change, making them a significant player in the political landscape.