Useful.

Trump’s Bizarre Behavior Has a Clinical Name: Disinhibition

Colby Hall, January 20.

One of the earliest and most underreported warning signs of certain forms of dementia is not memory loss. It is disinhibition — a deterioration of impulse control, judgment, and social restraint that often manifests as reckless behavior, inappropriate speech, and diminished concern for consequences. By the time forgetfulness becomes obvious, the disease process is often well underway.

That framework matters because it closely tracks what President Donald Trump has been displaying with increasing frequency.

And increasing revoltingness.

Grievance has long shaped Trump’s behavior. His fixation on the 2020 election, anger over criminal investigations, and instinct for escalation remain constant. What has changed is the degree to which those impulses now appear untethered from outcome. Actions that weaken alliances, undercut stated objectives, and generate chaos without payoff suggest something beyond anger or strategy at work.

Disinhibition offers a framework that fits the observable pattern.

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Clinically, disinhibition often appears before memory loss, particularly in frontotemporal dementia. Individuals may seem energetic, confident, even dominant. What erodes first is judgment. Filters weaken. Social norms lose force. Behavior becomes impulsive, inappropriate, and unconcerned with consequence. That framework does not establish a diagnosis. It explains why behavior changes in ways that feel abrupt and destabilizing.

Trump himself has intensified attention on the issue. In recent weeks, he has repeatedly and unpromptedly defended his cognitive fitness, boasting about mental sharpness and tests no one was publicly challenging. Clinicians recognize this pattern. People respond defensively to doubts that have already begun to surface.

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Trump’s recent behavior presents a coherent and escalating pattern. The loss of restraint is public, persistent, and increasingly disconnected from consequence. Disinhibition is a clinical concept, not a political insult, and it describes how judgment can fail before memory does.

The danger lies not only in the behavior itself, but in the absence of any visible response to it. Advisers remain quiet. Party leaders defer. Congressional oversight is dormant. The presidency is operating as if impulse carries authority and escalation requires no check.

It all seems to fit.