Donald Trump could face a historic constitutional test after Democrats’ projected sweep, but Republicans may hold the key

A change in Congress could bring a rarely used constitutional provision back into focus. The 25th Amendment’s Section 4 has never been invoked, and Democrats have proposed a commission that could examine whether a president is unable to carry out the duties of the office. But even if election projections hold, a Democratic majority would not be enough to put the plan into effect or transfer power from President Donald Trump.

Rep. Jamie Raskin introduced the commission bill, H.R. 8275, in April. It was referred to the House Judiciary and Rules committees and has not become law. The proposal would create a 17-member panel: eight physicians, including four psychiatrists; eight former senior executive branch officials; and a chair. Congress could direct the commission to examine the president.

A commission could assess incapacity, but it could not act alone

Section 4 requires the vice president and a majority of either the Cabinet or a congressionally established body to jointly declare that the president is unable to perform the duties of the office. If that declaration is sent to Congress, the vice president immediately assumes those powers as acting president. The amendment does not remove the president from office.

That makes Vance central to any Section 4 effort. If Trump contests the declaration, the vice president and a majority of the Cabinet or commission have four days to reaffirm it.

Congress then has 21 days to decide the issue. The president remains unable to exercise the powers of the office only if two-thirds of both chambers vote to sustain the declaration; otherwise, he resumes them.

There is another major hurdle: the commission must first be established by law. That means a bill would need to pass both chambers and go to Trump to sign. If he vetoed it, Congress would need two-thirds support in each chamber to override him. A projected Democratic majority would not, by itself, establish the commission.

The medical claims need careful handling

Raskin has argued that Trump’s public statements raise concerns about his capacity. Those are the sponsor’s stated reasons for the bill, not a medical finding.

The claims in the supplied material about neurological decline, speech and movements should not be presented as established proof of incapacity: the commission does not exist and has not examined Trump.

The White House physician’s report from May said Trump was in “excellent health” and “fully fit” to serve.

Election projections may change which proposals Congress chooses to take up when the new session begins. They do not activate Section 4. For that to happen, lawmakers would first have to pass a law, and Vance would still have to join the declaration.

The constitutional question is not simply whether Congress can investigate a president; it is whether the president is unable to do the job and Section 4 sets a high bar for answering it.