Here’s my strong take on how this all works out:
- Trump resigns or is removed from office
- Barr resigns or is removed from office
- Mulvaney is out on his ass too, but as CoS serves at the pleasure of the president, this requires no great wizardry
- Giuliani is charged with violations of the Hatch Act and is disbarred
- Pence, despite his complicity as indicated within the whistleblower doc, is let go with a vote of censure by the House, not full impeachment. He serves out the rump end of the Trump/Pence Presidential-term-as-utter-debacle.
Measure 5 happens only as to give Republicans a fig-leaf of compromise to point to, and to prevent the appearance that this was all a power grab to install President Pelosi (however briefly.)