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

**Stage 1 — Blind analysis (ignore market prices):**

The 25th Amendment contains two relevant pathways: *Section 3* (voluntary, temporary transfer of power when the President declares inability) and *Section 4* (involuntary, requires the Vice President plus a majority of the Cabinet to declare the President unable, with a two-thirds congressional override if contested). Historically Section 4 has never been successfully used, while Section 3 has been used a handful of times for scheduled procedures.

Arguments pushing probability up include the President's advanced age relative to the average, intense public attention on signs of cognitive or physical decline, and the simple fact that routine medical procedures (e.g., colonoscopies, surgeries) create low-friction opportunities to use Section 3. An acute medical event (stroke, heart attack, severe infection, or coma) would sharply raise the chance of a invoked transfer, either voluntarily or involuntarily. Media scrutiny and repeated public calls from opposition politicians and commentators increase political pressure and could prompt preemptive use of Section 3 to avoid a spectacle.

Arguments limiting probability are strong institutional and political barriers: Section 4 is extraordinarily high-cost and politically fraught (VP + majority of Cabinet must act, then Congress must reach two-thirds in both houses to sustain removal). The Cabinet and VP are heavily incentivized to remain loyal; removing a sitting president from the same party would be a career-ending partisan escalation and is therefore highly unlikely absent near-certain medical incapacity. Even Section 3 requires the President's cooperation; a President who prioritizes image and political messaging may prefer to avoid formal temporary transfers unless medically necessary. Given these frictions, a forced removal under Section 4 is a very low-probability event.

Balancing these factors, the realistic paths are (a) small but plausible chance of Section 3 being used for a scheduled or precautionary medical procedure, and (b) much smaller chance of Section 4 being invoked in any contested way. Aggregating these, I put the independent probability at 15% that some form of the 25th Amendment will be used during this presidency.

**Stage 2 — Market calibration (compare to current prices):**

The market currently prices "Yes" at 27%, notably higher than my 15% estimate. Possible reasons for that divergence:

- *Rhetorical noise and media salience.* Recent stories about a "sleepy appearance" and repeated public calls increase short-term attention and may push traders to overestimate the likelihood of formal action. Markets often overweight salient anecdotes versus structural barriers.

- *Confusion between Section 3 and Section 4.* Some participants may assume any public call for the 25th implies a credible path to removal, ignoring that most calls are rhetorical and that Section 3 (voluntary transfer) is easier and more plausible. That could artificially lift the "Yes" price as traders conflate low-friction temporary transfers with high-friction forcible removals.

- *Tail-hedging demand.* A minority of traders could be buying "Yes" as insurance against low-probability, high-impact health events. Such hedging can sustain prices above objective odds.

- *Liquidity and positioning.* With substantial volume (141k+ contracts), noisy speculative flows, herd behavior, and momentum can push prices away from fundamentals.

Given those factors, the market appears to be pricing in more weight on rhetorical pressure and tail events than I think is warranted. My independent 15% reflects the empirical record (Section 4 never used, Section 3 used rarely and typically for planned procedures), institutional incentives, and the political costs of activating Section 4. Therefore I view the market as likely overstating the true risk, though not by an order of magnitude: the possibility of a medical emergency or a voluntary Section 3 transfer keeps the event non-trivial.