While the Anti-Federalists feared a single executive would lead to tyranny, presidential power has grown significantly because a single person can provide faster leadership than a large legislative body like Congress.

The presidency has expanded through the use of both constitutional and implied powers:

: Originally, Congress was the dominant branch, but the executive and legislative branches reached more equal footing over time.

Alexander Hamilton argued that a "vigorous" and "energetic" executive is essential for a steady administration of laws and national security.

: International agreements that do not require Senate approval.

: Explicitly stated in Article II of the Constitution (e.g., the power to veto, appoint federal judges, and serve as Commander-in-Chief).

: Today, the president wields immense power over national security and economic policy, often justifying this expansion as necessary for effective governance in a complex world.