Donald Trump is not a Republican, he is a con man.
If I were a Senator I would vote to impeach former President Trump. If I was a Democrat Senator I would vote to impeach because what Trump did is unforgivable and it is a good move politically. If I were a Republican Senator I would vote to impeach because what Trump did is unforgivable and it is a good move politically in the long run.
The peaceful transfer of power is so important that anyone who tries to subvert it, however ineptly, deserves to be banned from the public square forever.