It was the launch pad for an unprecedented and victorious campaign, a"huge celebration", his former advisor Dan Pfeiffer recalled on a recent podcast.
He has since taken to Twitter to discuss the crisis, called on Americans to help him defeat Mr Trump on Nov 3, and put forward questions to the president ahead of his daily coronavirus task force briefings."It's certainly a highly unusual time and it has meant that all campaigns are on mute," American University professor of government David Lublin told AFP Friday.
Mr Biden expects to earn the endorsement of Mr Obama, who remains very popular among Democrats and whose rare public political pronouncements carry significant weight.
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