Biden needs to prove he has the leadership necessary to continue the presidency and campaign. He must do this by organizing one of the most unorganizable groups in politics: a broad swathe of democratic party organs in a state of absolute panic.
Which... early signs are he's actually succeeding.
I find it very weird how many thoughtful people seem to believe that a president's job is not to resolve crises, but to ensure there is never a crisis. We were terribly spoiled by President Obama