Biden Dismisses Concerns Over His Stamina at Age 81
• Biden insists he "feels so much younger" than his 81 years, causing eye-rolls among staff who want him to rest more • Biden is his "own worst enemy" regarding his schedule, typically only holding events between 10am-4pm daily • Polls show voters concerned about Biden's mental fitness and ability to handle the job through age 86 • Despite stumbles and falls, Biden makes joking references to his age and insists he can handle the demands • Jill Biden and aides warn the nonstop work pace could "kill him" but Biden wants to keep up a grueling schedule