This is one reason why the legislature should be in charge instead of judges. Most of the Wisconsin Supreme Court would have to recuse itself in this case. The liberals won’t, however.
I doubt that the witnessing judges would have to recuse themselves. The fact that they know (or at least think they know) what actually happened in that room would be a plus, not a minus, and no reason for recusing themselves.
Politically, the sitting judges will always have a stake in the matter, so that’s not a reason to recuse. Directly witnessing? I tend to doubt it, but I could be wrong.
Time to clean house. I say, let’s get on with it.