He should refer to him as Traitor Joe throughout the debate
And we should refer to his going into hiding as “House Arrest”. When Biden hits the campaign trail it is “Supervised Release”. Build the linkage of criminality in the minds of voters.
Yes, and get in a quick zinger now and then while on another subject, before they can react and stop him.
Something like “You keep promising no raised taxes, then backing out. Speaking of taxes, did you pay taxes on your payoffs from Ukraine and China?”