The 25th Amendment is invoked by written declaration sent to the Speaker of the House and the President pro tempore of the Senate, but the question of how the 25th Amendment is invoked has four different answers depending on which section applies. Section 1 operates automatically when the presidency is vacant. Section 2 is used by the President to nominate a new Vice President. Section 3 is used by the President to temporarily hand off power. Section 4, the involuntary provision, requires the Vice President and a majority of the Cabinet acting together. Each has its own trigger, its own signatories, and its own consequences.1Gerald R. Ford Presidential Library & Museum. The Establishment and First Uses of the 25th Amendment
Section 1: No One Invokes It, It Just Operates
If the President dies, resigns, or is removed from office, the Vice President becomes President under Section 1. Not Acting President. President, with full and permanent authority.2Congress.gov. Twenty-Fifth Amendment Section 1 Nothing needs to be filed and no vote is taken. The transfer happens by operation of the constitutional text.
Section 1 has been used once, when Vice President Gerald Ford became the 38th President on August 9, 1974, the moment Richard Nixon’s resignation took effect.3Congress.gov. Overview of Twenty-Fifth Amendment, Presidential Vacancy and Disability
Section 3: The President Voluntarily Transfers Power
Under Section 3, the President sends a written declaration to the Speaker of the House and the President pro tempore of the Senate stating that they are unable to carry out the duties of the office.4Congress.gov. Twenty-Fifth Amendment Section 3 The moment the letter is transmitted, the Vice President becomes Acting President.
To take power back, the President sends a second letter to the same two congressional leaders stating the inability no longer exists. Authority returns immediately. Congress plays no gatekeeping role and no waiting period applies.5Ronald Reagan Presidential Library & Museum. Constitutional Amendments – Amendment 25
In practice, presidents have used Section 3 for planned medical procedures involving anesthesia. President George W. Bush invoked it twice, in 2002 and 2007, both for routine colonoscopies. President Joseph Biden invoked it on November 19, 2021, also for a colonoscopy; Vice President Kamala Harris served as Acting President for roughly 85 minutes.6Congress.gov. Presidential Disability Under the Twenty-Fifth Amendment
Section 4: The Involuntary Route
Section 4 is what people usually mean when they talk about “invoking the 25th Amendment” in a crisis. It applies when a President cannot or will not acknowledge their own incapacity, and it has never been used.7Congress.gov. The Twenty-Fifth Amendment: Sections 3 and 4 – Presidential Disability
Two parties must act together. The Vice President and a majority of the principal officers of the executive departments jointly sign a written declaration and transmit it to the Speaker of the House and the President pro tempore of the Senate.8Cornell Law Institute. U.S. Constitution – 25th Amendment Neither side can act alone. There are currently fifteen executive departments, so at least eight department heads would have to sign on with the Vice President.9The White House. The Executive Branch
Transfer is immediate. The Vice President becomes Acting President the moment the joint declaration reaches Congress, without any court ruling or congressional vote at this stage.10Congress.gov. U.S. Constitution – Twenty-Fifth Amendment
One question the amendment doesn’t answer: whether acting or unconfirmed secretaries count toward the Cabinet majority. The text refers to “principal officers of the executive departments” without defining Senate confirmation as a requirement. If several seats are filled by acting officials, a President could challenge the count, and the courts would likely be pulled in during an already unstable moment.
What Happens if the President Fights Back
A President declared unable to serve under Section 4 can push back by sending their own written declaration to the Speaker and the President pro tempore stating no inability exists.8Cornell Law Institute. U.S. Constitution – 25th Amendment From that point, the Vice President and the Cabinet majority have exactly four days to respond with a second declaration reaffirming the inability. Miss that window, and the President’s powers are restored automatically.
If the Vice President and Cabinet do reaffirm within four days, Congress takes over on a tight schedule:3Congress.gov. Overview of Twenty-Fifth Amendment, Presidential Vacancy and Disability
- Congress must assemble within 48 hours if it is not already in session.
- Congress has 21 days from receiving the second declaration (or from assembling, if it was out of session) to decide.
- Both the House and the Senate must vote by a two-thirds margin that the President is unable to serve. If either chamber falls short, the President resumes full authority.
Throughout the dispute, the Vice President continues as Acting President. The two-thirds bar is the same supermajority required to convict in an impeachment trial, and it deliberately tilts the process in the President’s favor: rallying just one-third-plus-one of either chamber is enough to reclaim the office.
Congress Can Replace the Cabinet in the Process, but Hasn’t
Section 4 does not lock the Vice President into working with the Cabinet. Its text also allows the Vice President to act alongside “such other body as Congress may by law provide.”8Cornell Law Institute. U.S. Constitution – 25th Amendment Congress could, by statute, create an independent commission to evaluate presidential fitness and let that commission replace the Cabinet’s role.
Congress has never done so. Bills have been introduced over the years without becoming law. One recent effort, introduced in April 2026 by Representative Jamie Raskin, would establish a Commission on Presidential Capacity made up of retired executive branch officials, physicians, and psychiatrists appointed by bipartisan congressional leadership, with members barred from holding current government positions. Under the proposal, a majority of the commission could join with the Vice President to declare the President unable to serve. Until something like this passes, the Cabinet remains the only body that can participate in an involuntary declaration.
Section 2: Filling a Vacancy in the Vice Presidency
Section 2 handles the reverse problem: an empty vice presidency. When the Vice President dies, resigns, or moves up to the presidency, the President nominates a replacement who must be confirmed by a majority vote in both the House and the Senate.11Congress.gov. Twenty-Fifth Amendment Section 2 Dual-chamber confirmation is unusual; most presidential nominations need only Senate approval.
The nominee must meet the same eligibility rules as a candidate for the presidency: natural-born citizen, at least 35 years old, and a resident of the United States for at least 14 years. Each chamber runs its own hearings and background review before voting.
Section 2 has been used twice. After Vice President Spiro Agnew resigned in October 1973, President Nixon nominated Congressman Gerald Ford of Michigan, and Congress confirmed him. When Ford himself became President the following year, he nominated Nelson Rockefeller, whom Congress confirmed in December 1974.1Gerald R. Ford Presidential Library & Museum. The Establishment and First Uses of the 25th Amendment