My humble and unorthodox advice to the Biden campaign is...just start governing.
You cannot campaign in the traditional sense. You cannot hold rallies and pose with supporters. So, what do you do? Just start governing. Act like you're the president.
Assemble your own pandemic response team of experienced professionals and detail how you would handle the health crisis.
Assemble your own economic team to and detail how you would handle the economic crisis.
Hold a virtual joint press conference with the governors.
Hold a virtual joint press conference with African American leaders.
Hold a virtual joint press conference with progressives like the squad.
Hold a virtual joint press conference with seniors.
Schedule these events every day.
Contrasting your steady leadership with Trump by doing these daily sessions which show how you would govern will provide reassurance that there is a return to normalcy.
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A couple of days ago, I imagined him doing exactly that. 
As for the dreadful, dreadful ethical and political mistakes of posturing publicly as an illicit "president:" 
We the People elect officials from among us to govern of, by and for us. There's obviously more than one way to destroy a democracy, and for sure Putin would be delighted with a move like this, but Biden won't be assisting in destroying confidence in ours.
A pretender to the presidency who publicly attempted to "govern" without being elected wouldn't even need a bunch of press conferences (!). Just one or two announcing this virtual sedition would explode politically. There would be press coverage, all right, but not the kind imagined.
But on the plus side, the presumptive Democratic nominee, widely expected to become president, unofficially offering in a time of great national disaster a sort of pre-coordination through discussion, suggested guidance, and information about what he will be doing as president to ELECTED officials to consider now, is a WHOLE different matter.
VP Biden is already doing that, both directly himself and through potential future appointees to high offices who would be working with the people they're talking with now. Quietly, legally, ethically, and without dangerous national outrage and disruption that would benefit Repub-Russia's destructive goals.
I'm glad I'm not Joe.
