Then there’s Mr. Trump. He rose to political prominence on the back of a conspiracy theory and exploited several others to rally his troops. His detractors resort to other conspiracy theories (mass voter suppression, Russia, etc.) to explain his 2016 Electoral College victory, and he invokes one (millions of illegal voters) to explain his failure to win the popular vote. Mr. Trump’s coalition is a big tent where people with tinfoil hats get to belly up to the Kool-Aid punch bowl, proudly wearing their QAnon, Pizzagate, anti-Deep State name tags.