I wonder how Biden would fuck that up. There would definitely be instant fortifications around the remaining justices. No opportunity for the adventurism to spread. Biden would get to appoint the replacement with a frothing right wing calling for retaliatory violence and I feel like that would compel him to find another republican. I just can't see the democrats saying "sad, anyway let's appoint a 30 year-old liberal before 2024." They would make the worst decision in the interest of civility.