“Contrast her age and vitality with his,” the senior aide to Harris, 59, said early on Saturday. Questions over whether he was too enfeebled forced Joe Biden to halt his bid for re-election to the presidency during the summer. The 81-year-old Democrat dropped out of a rematch with Trump on 21 July and endorsed Harris to succeed him. Recent national polling averages show Harris with a nearly four-point edge over Trump in the 5 November race for the presidency. “And in fact, I’m quite critical of it coming from someone who wants to be president of the United States.”