As scrutiny intensifies, some Republicans have questioned Biden's mental and physical fitness for office amidst his presidential run at an advanced age. Reports within a new book claim that Biden exhibited noticeable cognitive decline, failing to recognize key figures and showing signs of severe physical deterioration during his last year in office. Senator Chris Murphy acknowledged that Democrats should have listened more to voter concerns regarding Biden's health.

Vice-President JD Vance has also raised questions about whether aides concealed aspects of Biden's health, emphasizing that anyone unfit for duty should refrain from holding office. Medical experts assert that Biden's cancer likely predated his diagnosis, indicating he may have had it since the early days of his presidency. Critics speculate on the sufficiency of his routine health screenings, especially after previous benign prostate treatments.

Some specialists, however, argue against the notion that there was a failure to detect this type of aggressive cancer. Prostate cancer remains a common diagnosis among men, with CDC data indicating that around 13 in every 100 American men will confront this illness during their lives.