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

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

The 25th Amendment has two practically distinct uses: (a) *Section 3* voluntary, temporary transfers of power when a president is incapacitated (e.g., medical procedures requiring anesthesia); and (b) *Section 4* involuntary transfer/removal when the vice president and a majority of the Cabinet declare the president unable to discharge the powers and duties of the office. The historical record shows the amendment has been invoked for temporary transfers in modern presidencies but has never been successfully used to permanently remove a president under Section 4. That difference matters: Section 3 is routine, administratively simple, and precedent exists; Section 4 is politically explosive, untested for removal, and requires cooperation (or a congressionally-designated body) that is very unlikely when the president's own party controls the executive branch.

I separate the two pathways and combine them into an overall probability of any use during the term. For Section 3: presidents commonly require at least one medical procedure or unforeseen medical issue over a four-year term that could justify a formal, temporarily transfer of power (colonoscopies, outpatient procedures, brief hospitalizations). Trump’s age and known health history increase the baseline medical risk modestly compared to younger incumbents; even a routine colonoscopy or similar procedure would normally lead to a Section 3 invocation, and those are both common and publicly visible. I estimate a roughly 40% chance that Section 3 will be invoked at least once during the term.

For Section 4: the procedural and political hurdles are high. It requires the vice president and a majority of the Cabinet (or a body designated by Congress) to act against the president. Historical evidence (e.g., the 2021 episode where Vice President Pence declined to invoke Section 4) shows close presidential allies resist. If the vice president is politically aligned and loyal (which is likely if the same party controls the White House), the chance of a coordinated Cabinet removal is tiny. However, extraordinary events (catastrophic neurological event, clear evidence of incapacity combined with a break in loyalty of the VP and several Cabinet members) could create a low-probability path. I assign Section 4 a roughly 5% chance.

Combining: treating Section 3 and Section 4 as mostly disjoint events, overall probability that some part of the 25th Amendment is *used* during the presidency is roughly 1 - (1-0.40)*(1-0.05) ≈ 43% (rounded to 45% to reflect tail risk and uncertainty in medical/procedural frequency).

**Stage 2 — Market calibration (considering current prices):**

Current market prices: Yes 0.25 / No 0.75. My independent estimate (45%) is substantially higher than the market. Possible reasons the market trades lower:

- Market participants may be conflating the political drama of Section 4 (rare, controversial) with the more prosaic Section 3 uses and therefore anchoring on the low historical frequency of *removal* rather than any invocation. - The market could overweight political loyalty dynamics (assume a VP and Cabinet will never defect) and underweight routine medical events that have historically led to temporary transfers. - Liquidity and trader composition: with ~143k contracts volume, the market is active but some traders may be ideologically driven or risk-averse, pressing the price down for Yes. Large partisan positions can skew market price away from unbiased expected probability. - Ambiguity in the event wording: if participants interpret “used” as specifically meaning Section 4 removal, they will price much lower. I infer the wording includes any Section, and I price accordingly; markets may not.

If the market indeed conflates the two meanings or understates the chance of a Section 3 transfer, it is underpricing the true probability by ~20 points. That suggests a potential value trade for someone who expects at least one Section 3 invocation (routine medical events) to occur.

Conversely, reasons to respect the market: voters and on-chain traders often have political insight into the president’s circle and the likely loyalty of the VP / Cabinet; if the vice presidency is filled by a particularly loyal figure or if the president systematically avoids standard procedures that would require a formal transfer, the true chance could be closer to 25–30%. Given uncertainty, my 45% is a calibrated, somewhat contrarian view that emphasizes the medical/routine pathway more than traders presently appear to.

Bottom line: independent probability = 45%. The market at 25% is plausibly underestimating **Section 3** use and/or suffering from ambiguity bias; if you believe the event text intends *any* use (not just forced removal), the market is likely mispriced downward.