In the long theater of public life, even the smallest details of a leader's appearance become mirrors in which a watching world sees its own curiosity and anxiety reflected. On a Friday afternoon in New Jersey, President Trump descended from Air Force One with what observers described as noticeably darker hair, and within hours the internet had transformed a minor aesthetic observation into a minor cultural event. It is a reminder that in the age of instantaneous image-sharing, nothing about a public figure — not even a hair color — escapes the collective gaze.