The primary role of the executive branch in the U.S. government is to enforce and implement laws. Headed by the President, this branch administers federal policies and oversees various government agencies. The executive also plays a crucial role in shaping domestic and foreign policy, including international treaties and military decisions. Additionally, the President has the power to veto legislation, appoint federal judges, and issue executive orders. The effectiveness of the executive branch greatly influences the overall functioning of government and its ability to respond to national and global challenges.