Definition
The unitary executive theory is an interpretation of Article II of the Constitution. It argues that because the Constitution vests the executive power in a single president, the president must hold full control over everyone who exercises that power.
Under this reading, all executive officials ultimately answer to the president, and Congress cannot insulate them from presidential direction or removal. The theory is contested: critics argue that Congress has long created independent agencies and that the text does not require such a rigid chain of command.
Why it matters
How it works
The theory rests on the vesting clause of Article II and the president's duty to take care that the laws be faithfully executed. Supporters argue these clauses imply a power to supervise and, where needed, remove subordinate officials.
In practice, disputes arise over for-cause removal protections that Congress attaches to certain offices, such as agency commissioners. Courts have, over time, narrowed when such protections are constitutional, especially for single-headed agencies, while leaving room for some multi-member independent bodies. The doctrine remains a live and evolving area of constitutional law.