The unitary executive theory is a theory of American constitutional law

United States Constitution

The Constitution of the United States is the supreme law of the United States of America. It is the framework for the organization of the United States government and for the relationship of the federal government with the states, citizens, and all people within the United States.The first three...

 holding that the President

President of the United States

The President of the United States of America is the head of state and head of government of the United States. The president leads the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces....

 controls the entire executive branch. The doctrine is based upon Article Two of the United States Constitution

Article Two of the United States Constitution

Article Two of the United States Constitution creates the executive branch of the government, consisting of the President and other executive officers.-Clause 1: Executive power:...

, which vests "the executive power" of the United States in the President.

Although that general principle is widely accepted, there is disagreement about the strength and scope of the doctrine. It can be said that some favor a "strongly unitary" executive, while others favor a "weakly unitary" executive.