At the center of the allegation is Joe Biden and his mental fitness to fully understand or execute the duties of office. If a president were truly unable to grasp the decisions placed before him, the issue would extend far beyond personal health. It would implicate the surrounding system—advisers, Cabinet members, and constitutional mechanisms designed precisely to address incapacity. The concern, framed this way, is not partisan but structural: how a democracy safeguards continuity without deception.