Section 4 of the Twenty-Fifth Amendment lets the Vice President and a majority of the Cabinet declare the President unable to serve, which immediately makes the Vice President the Acting President. The President can fight back with a written declaration of fitness, and if the Vice President and Cabinet stand by their claim, Congress decides the question by a two-thirds vote in both chambers. It has never been used.
Who Has to Agree Before Anything Happens
Section 4 requires two sets of actors: the Vice President and a majority of “the principal officers of the executive departments.” That phrase points to a specific list. The executive departments are the fifteen Cabinet-level departments identified in 5 U.S.C. § 101, and the principal officers are the secretaries who head them.1Office of the Law Revision Counsel. 5 USC 101 – Executive Departments
Those fifteen positions are:
- Secretary of State
- Secretary of the Treasury
- Secretary of Defense
- Attorney General
- Secretary of the Interior
- Secretary of Agriculture
- Secretary of Commerce
- Secretary of Labor
- Secretary of Health and Human Services
- Secretary of Housing and Urban Development
- Secretary of Transportation
- Secretary of Energy
- Secretary of Education
- Secretary of Veterans Affairs
- Secretary of Homeland Security
A majority means at least eight of these secretaries, plus the Vice President. Officials who attend Cabinet meetings but do not head one of the fifteen departments have no vote. The EPA Administrator, the U.S. Trade Representative, the White House Chief of Staff, and the U.N. Ambassador cannot participate in a Section 4 declaration regardless of their standing in the administration.
The amendment also allows Congress to designate “such other body as Congress may by law provide” in place of the Cabinet, with the Vice President still required.2Constitution Annotated. Overview of Twenty-Fifth Amendment, Presidential Vacancy and Disability Congress has never done so. A bill introduced by Representative Jamie Raskin and Speaker Nancy Pelosi in 2020 would have created a nonpartisan commission for this purpose but did not advance.3Office of Congressman Jamie Raskin. Raskin Reintroduces 25th Amendment Legislation Establishing Independent Commission So today, the group making the determination is the President’s own Cabinet.
What “Unable to Serve” Actually Means
The amendment does not define inability. The framers considered language tied to medical diagnosis and rejected it, leaving a practical standard: can this person do the job right now? A President in a prolonged coma clearly qualifies. A severe mental health crisis that impairs executive judgment might also qualify.4Cornell Law School. 25th Amendment
The White House Physician has no formal role. Doctors would almost certainly be consulted for a physical incapacity, but their input is advisory. The Vice President and Cabinet make the call.
The Moment Power Transfers
Once the Vice President and at least eight Cabinet secretaries agree, they transmit a written declaration to the President pro tempore of the Senate and the Speaker of the House. The transfer of power is immediate on transmission. The Vice President becomes Acting President the moment congressional leaders receive the letter.4Cornell Law School. 25th Amendment
An important distinction: the President is not removed from office. The President keeps the title but loses all executive authority. The Vice President serves as Acting President, not as President. No vacancy is created, which is what makes the rest of the process possible.
How the President Fights Back
The President can reclaim authority by sending a written declaration to the same two congressional leaders stating that “no inability exists.” On transmission of that letter, the President immediately resumes full powers and the Vice President’s acting role ends.4Cornell Law School. 25th Amendment
A single letter is enough to restore presidential authority, at least temporarily. The design leans toward the sitting President: a recovering President should be able to resume governing without waiting on any process. The burden then shifts back to the Vice President and Cabinet if they still disagree.
The Counter-Declaration and the Congressional Vote
If the Vice President and Cabinet believe the President is still unable to serve, they have four days after receiving the President’s declaration to file a counter-declaration with congressional leaders.4Cornell Law School. 25th Amendment The moment that second letter is transmitted, the Vice President resumes acting authority and the dispute moves to Congress.
If Congress is not already in session, it must assemble within forty-eight hours.5Congress.gov. U.S. Constitution – Twenty-Fifth Amendment Congress then has twenty-one days to decide. The Vice President continues serving as Acting President throughout that window.
The voting threshold is steep. Both the House and the Senate must vote by a two-thirds supermajority that the President is unable to serve.4Cornell Law School. 25th Amendment If both chambers hit that bar, the Vice President continues as Acting President. If either falls short, or if Congress fails to vote within twenty-one days, the President automatically resumes full authority. The burden sits on those challenging the President.
Nothing in Section 4 permanently removes anyone. A President whose powers are transferred keeps the office and can keep sending “no inability exists” letters, restarting the four-day window each time. The Cabinet’s leverage is the ability to file another counter-declaration and force another congressional vote.
Section 4 Is Not Impeachment
The two are often confused, and it helps to keep them separate. Impeachment addresses misconduct: treason, bribery, or other high crimes and misdemeanors. Section 4 addresses inability, with no allegation of wrongdoing. A President in a coma has done nothing wrong; someone still has to run the executive branch.
The outcomes differ too. Impeachment and conviction remove a President permanently and can bar future federal office. Section 4 transfers power but leaves the President in office, with a live route back to authority. The thresholds also differ: impeachment requires a simple House majority and two-thirds of the Senate, while Section 4 requires two-thirds of both chambers to sustain the transfer.
Why It Has Never Been Used
The closest brush came on March 30, 1981, after President Reagan was shot. White House officials drafted the letters needed to transfer power to Vice President George H.W. Bush under Section 4. The documents were never signed.6Reagan Presidential Library. The 25th Amendment – Section 4 and March 30, 1981 Surgeons removed the bullet, Reagan recovered, and the crisis passed.
The episode exposed the political dynamics that make Section 4 hard to use. White House Communications Director David Gergen later described an overwhelming urge to project calm and avoid any appearance of undermining the President. Former Secretary of State Alexander Haig called even the preparation of transfer documents “ill-advised.”6Reagan Presidential Library. The 25th Amendment – Section 4 and March 30, 1981
The structural problem runs deeper than any one crisis. Cabinet secretaries serve at the President’s pleasure. A secretary who joins a Section 4 declaration and fails to sustain it through Congress should expect to be fired the moment the President regains authority. A President who senses an effort forming can dismiss the participants before they act. The amendment offers no protection against retaliation, and Congress has never created the independent “other body” that might sidestep the loyalty problem. Combined with the two-thirds threshold in both chambers, the result is a mechanism designed to be difficult to trigger and even harder to sustain.