In the wake of President Trump's disastrous press conference after his meeting in Helsinki with Vladimir Putin, and his ham-handed efforts to walk back some of the things he said there, something has begun to dawn on me about his approach to the presidency and why his supporters are still so maniacally devoted to him. It's because they share a distaste, even a loathing, for professionals and experts.

I was watching the PBS NewsHour last night, and I heard the analyst Mark Shields express his d...