First, From Art:
First, we have to avoid references to ‘the law’ as if it the same thing here as we think of in every day life. Normally, if you violate the law a cop arrests you or issues a ticket and you talk to what we hope is an impartial judge. You might get a jury of disinterested ‘peers’ and a decision is made and sentence carried out. In this case ‘the law’ is very different. Nobody gets hauled off in cuffs, not even a ticket. And there is no judge. Only a jury of, in this case, 100 senators of whom the majority are both not disinterested and profoundly disinclined to see anything wrong with what Trump has done. And Pence.
And no, the GOP cannot be shamed into voting for America and against their party. There is literally no violation that can’t be rationalized. It really doesn’t matter what the law says. Either he/they didn’t do it, or they did it but it is religiously justified (God allows sin to be used to accomplish a greater good), or ethnically justified (remember that Russia and the GOP are all Christian white guys), or the violation of law is just part of the game where the real payoff is making liberals cry and impeachment is just another failed attempt to smear the GOP by a feckless and ineffectual Democratic party.
Second, there is the timing. Start impeachment now and it will be all over before it has much effect of the 2020 election.