I think it's more about using the language that is close to people. When you listen to Trump's speeches, he's virtually the only high-rank politician who speaks

I think it's more about using the language that is close to people. When you listen to Trump's speeches, he's virtually the only high-rank politician who speaks in a way that voters can understand. Politicians created their own lingo that only themselves and those actively interested in politics can understand, and using phrases like "he's a retard" solves this problem.