Trump's vulgarity is a feature not a bug
...President Trumps crude performance last week at an annual gathering of conservatives he physically embraced the American flag, called the Mueller probe bullshit and referred to Rep. Adam Schiff as shifty was an affront to the decorum we expect from presidents, and plenty of critics pointed this out. Trump was not merely undignified as a leader; he is committed to stripping away the dignity possessed by others, Michael Gerson wrote in The Washington Post. One Twitter commenter described the speech as an undignified mess of slop, and another labeled Trump the most undignified President in history....
...In fact, demagogues like Trump are almost always undignified. That is a feature, not a bug, of their politics. When Hillary Clinton infamously described his supporters as a basket of deplorables, Trump swiftly converted the comment into a badge of honor. It turned out that he wanted his followers to trumpet themselves as Les Deplorables because that was already his argument. While their critics think demagogues hurt themselves politically by violating the standards of polite society, theyre doing the opposite: Theyre doubling down on an unorthodox but potent politics.
In other words, we must understand why Trumps CPAC performance was rational from his perspective before we can begin to understand how to deal with it. And that means taking Trump, his supporters and his undignified performances seriously.
A textbook demagogue meets four tests. First, he identifies as a man of the masses, usually by attacking elites. Second, he creates great waves of passion. Third, he uses that passion for political benefit. Fourth, he tests or breaks established rules of governance. Taken together, this approach enables the demagogue to create a state within a state a massive cult that follows him alone...
https://www.washingtonpost.com/outlook/yes-trump-is-undignified-demagogues-have-to-be/2019/03/08/bd8d8d9c-4109-11e9-a0d3-1210e58a94cf_story.html?utm_term=.43bb9c6fae51