David Frum in The Atlantic:
Who and what Donald Trump is has been known to everyone and anyone who cared to know for years and decades. Before he was president, he was the country’s leading racist conspiracy theorist. Before he was the country’s leading racist conspiracy theorist, he was a celebrity gameshow host. Before he was a celebrity gameshow host, he was the multi-bankrupt least trusted name in real estate. Before he was the multi-bankrupt least trusted name in real estate, he was the protege of Roy Cohn’s repeatedly accused of ties to organized crime. From the start, Donald Trump was a man of many secrets, but no mysteries. Inscribed indelibly on the public record were the reasons for responsible people to do everything in their power to bar him from the presidency.and
Instead, since he announced his candidacy in mid-2015, Donald Trump has been enabled and protected.
The enabling and protecting not only continues. It accelerates.
In 2016, there were voters who genuinely, in good faith, believed that Donald Trump was a capable business leader, moderate on social issues, who cared about the troubles of working class white America—and would do something to help. There may well still be some people who believe this—but nowhere near enough to sustain a presidency.
What sustains Trump now is the support of people who know what he is, but back him anyway. Republican political elites who know him for what he is, but who back him because they believe they can control and use him; conservative media elites who sense what he is, but who delight in the cultural wars he provokes; rank-and-file conservatives who care more about their grievances and hatreds than the governance of the country.