The comparisons have come hard and fast, at least since 2015. Trump is like Silvio Berlusconi, like Adolf Hitler, like Boris Johnson. A 2018 film called “The Trump Prophecy” took the evangelical route, comparing Trump to Cyrus the Great, the 6th century BC Persian monarch chosen by God to free Jewish captives in Babylon. But maybe it’s time to stop searching for the exact analogy for Trump, be he Cyrus or Boris, Adolf or a Silvio. What demands analysis is less the arrogant 73-year-old mediocrity in the Oval Office, but the worshipful attitude so many Americans have toward him. A...