He was President at impeachment. He is not at trial. Sounds like the Rain of Kamala will preside. The first action should be consideration of a motion to dismiss for lack of jurisdiction.
Absolutely.
The problem is that taking an action like that legitimizes the holding of a trial proceeding in the first place.
I think the best course is for the Supreme Court to refuse to participate. That sends a signal to Congress that they are encroaching on the legitimacy of the Presidency.
Congress under Pelosi has become one power grab after another, and they are way overreaching here.
Roberts can do go down in history as the Chief Justice who rewrote ObamaCare legislation, or he can go down in history as the Chief Justice who defined the boundaries of impeachment for future Presidents.
-PJ