“President Biden is a healthy, active and strong 81-year-old man,” his longtime physician concluded in a letter released by the White House. Joe Biden spent two and a half hours in the morning at the Walter Reed military hospital, in the suburbs of Washington.

If he wins in the November election, the Democrat will be 86 years old at the end of his second term. In an NBC poll, 76% of voters surveyed said they were concerned about Joe Biden's physical and mental capacity to serve a second term, compared to 48% for Donald Trump.