A key question that I'm not sure can be answered: among Republican reps and senators, what is the ratio of "on board with it all" to "terrified of what will happen to themselves if they don't appear to be on board"?

If the "terrified" camp is sufficiently large, their terror can be overridden with a sufficiently large swing in public opinion. They're potentially movable.

The true believers...not sure if anything can move them. If the "on board" camp is (nearly) all Republican legislators, then there is no path to impeachment.

It will be interesting to see how things evolve as the economic impacts of Trump's policies develop. That's probably the most direct path to the level of public opinion shift needed to make impeachment possible.

it appears that MAGA has successfully dismantled the USA. I don't expect any further fair elections, TBH. I'm rather aghast at how much of American corporate money is just either collaborating with an obviously criminal regime or just sort of blindly pretending business as usual can return with an election.

There is no current checks mor balances, a king runs America and Republicans smile because they are wearing the same color jersey and seem to think their longtime agenda is being implemented, when, no, a mafia is riding their agenda and party to absolute power.

The United States is not a state party to the Rome Statute of the International Criminal Court so there is exactly zero percent chance of anyone from the GOP appearing at The Hague.

The ICC in The Hague does not deal with internal conflicts, it mostly handles war crimes. The summary deportation of citizens to Salvadorian work camps is the only thing that might show up on the ICC's radar, for the rest of the crimes of Trump c.s. the judicial chain stops at your own Supreme Court.