Why? What is it exactly that you think Pence has done, in One Brow's words, "to damage the progressive agenda"? I think he was mostly inert towards the progressive agenda, but still the FBI did conduct a 5 hour search of his residence. The biggest difference is the FBI contacted Pence's lawyers first to inform Pence they were coming, but the FBI never did anything like that to the previous VP immediately after he left office or they would have found boxes of classified documents next to his corvette.
Hide your eyes all you want, but the role our nation's law enforcement agencies are now playing in investigating and prosecuting candidates is unprecedented. It isn't because Trump was some kind of extraordinary threat as both Trump and Biden are amateurs in corruption compared to people like LBJ.