Final answer:
The president has multiple roles and functions, including being the chief executive, chief legislator, commander-in-chief, and crisis manager.
Step-by-step explanation:
The president of the United States has several major roles and functions. As the chief executive, the president is in charge of the executive branch of government and is responsible for enforcing laws and overseeing major bureaucratic departments. As chief legislator, the president has the power to recommend bills, inform Congress about the state of the union, and veto legislation. As commander-in-chief, the president is the civilian head of the armed forces and has the authority to make military decisions. Finally, as crisis manager, the president is responsible for addressing and managing national emergencies and crises.