Which are less autonomous actors as individual congressmen?

Individual congressmen are generally considered less autonomous actors due to the influence of party leadership, constituent interests, and the need for collaboration in legislative processes. They often align their votes and positions with their party's agenda to secure support for their initiatives and maintain party cohesion. Additionally, the pressure from lobbyists and interest groups can further limit their independence in decision-making. As a result, while they may have personal beliefs, their actions are frequently shaped by external factors and collective dynamics within Congress.