Not an attorney... may be miles off base here:
The Constitution forbids any "bill of attainder". I had to look that one up. It means that no legislature can punish any person or group of people for something they have done in the past. That function belongs to the courts. The Senate and House cannot punish a private citizen.
Donald Trump is now a private citizen.
How is this so-called impeachment not a bill of attainder?
