Will Section IV of the 25th Amendment be used during Trump's Presidency?

The 25th Amendment, especially Section IV, is an extreme constitutional remedy that has almost never been used because it requires a vice president and a majority of the principal officers to move against a sitting president. That makes it far less a question of medical or mental fitness alone than of whether the president becomes so unable to function, or so politically toxic in a crisis, that top officials judge removal to be the least damaging option. In normal circumstances that bar is extremely high, so the default expectation should remain No.

Even so, the risk is not negligible. A second Trump presidency would combine a highly personalized leadership style with the possibility of acute health events, sharp cognitive decline with age, or a severe governing crisis that fractures confidence inside the administration. The strongest path to Yes would likely not be a routine policy disagreement, but an abrupt and unmistakable incapacity event, or a situation where senior officials conclude that continued presidential control creates an immediate national-security or constitutional emergency.

Compared with the current market price of 28%, the market looks somewhat skeptical relative to the tail risks embedded in a full term. My estimate is higher because the time window is long, the presidency is inherently high-variance, and the mechanism requires only one extraordinary episode rather than a sustained trend. Still, the market’s No bias is understandable because historical precedent strongly favors inaction, and the political costs of triggering Section IV would be enormous. The most likely outcome remains that it is never used, but the probability is not low enough to justify an outcome in the low 20s without more specific evidence of deteriorating capacity or cabinet rebellion.