I theorize that Sonny Callahan could have been the "Bo the Dog" death, since Bo was replaced by Sunny, but there are like 5 likely possible congressmen who died recently.
John Warner
Mike Gravel
John Bertrand Conlan
Harry Johnston
Sonny Callahan
I can't tell them apart :/
They kinda suck though.
Imho this is just to investigate Tucker's past. If it exposes him as controlled opposition i'm entirely fine with it.
I think the plan is that factory meat eventually removes a source of food from the public.