Democrats around the country have begun to pressure the Biden campaign to call off all debates with Donald Trump due to the coronavirus pandemic, they say.
In truth, the reason they don’t want Biden to debate Trump is that they don’t think Trump will play by their rules. The president would take over the debate and make it about what he wants, not what Biden wants.
Democrats are also worried about Biden’s mental stamina and his ability to remain engaged for an hour and a half during a debate. more here