As the Trump campaign’s self-implosion continues, and the candidate increasingly lashes out, many have pointed to historical parallels: Hitler in the bunker, Nixon at the height of Watergate.  But for me, the figure who comes to mind is not a politician but a literary character: Shakespeare’s Macbeth. Macbeth, whose “vaulting ambition” led to murder, civil war, and his own eventual destruction. Now I’m not saying that Trump has murdered anyone (Don’t sue me, Donald!), but the parallels are there.