Whatever the diagnosis, T's lows never seem to be fully plumbed, nor do the forecast assessments of his administration's short and long term damage.
 Although an eight year T would be more than twice as deleterious as would a four year presidency, despite punditry to the opposite, a 2020 win for T seems a long shot for reasons to include a mosaic of oppositions, age, health and at least one explosive event....perhaps Mueller....along the way there. 
For his successor however, T's outrageous template will provide opportunity for more than just cleanup as well as  new playbook concepts for this brave new world.