I suppose Biden could just issue a blanket, Hunter-style pardon for all members of the Democrat Party, for all crimes known and unknown committed during the last century, now being committed or to be committed.
He could, theoretically, do that.
It would be a marvelous thing to see...
It would forever label the Democratic Party as a criminal enterprise.
I think the SCOTUS would throw that one out the window 9-0
If Biden issued a pardon for every Democrat, he is basically admitting that they're guilty.
If he is going to do nothing, the Democrats can blame it on Trump due to partisan politics. They have help from mainstream media. It's not going to matter what the Trump Administration will discover on January 20.