rereading books about the end of the Nazi regime, and after 75 years people are still debating whether Hitler was delusional at the end and sincerely believed Germany could pull off an upset victory over the Allies or whether he knew the war was lost, and at what point. (Although the evidence points towards him recognizing reality, which makes the end of the war all the more puzzling in some ways.)

Drugs may play a factor in both these examples.

One difference: Trump's inner circle won't all commit suicide, so maybe we'll get answers to how delusional Trump really was during the last months of his administration.