“I don’t think he knows that he is alive,” TASS quotes him as saying.
Trump added that Biden is surrounded by "smart but evil people."
Earlier, the personal physician of Biden's predecessors as head of state, Barack Obama and Donald Trump, member of the United States House of Representatives Ronny Jackson said that Biden needs to pass a number of sanity tests before participating in the election.
As of late April, Joe Biden's job approval rating as president has fallen to a record low of 37% since his inauguration.