Ok,translated,this means,"Back off on Trump or we will go after Slow Joe."
From MY POV,they are shooting themselves in the feet if they don't go after the entire DNC.
Yeah,this does mean the DNC would go after the entire RNC.
I don't see that as a bad thing because we MIGHT end up with a government ran by Senators and Congresscritters that weren't being blackmailed into submission.