The American revolt against established politics. It is pretty obvious now, with polls of congress single digit positive results, the US has deep distrust of Congress. That distrust is how Ted Cruz was #2 in Republican Primary behind #45. Also why a large number of Democratic voters rejected Hillary. Also obvious is some reasons: Fear of jobs taken by immigrants (illegal or otherwise), despite record low unemployment. Wage stagnation, despite an otherwise strong growth. Blaming renewable energy (mainly wind) for coals decline, despite fracking being actual cause. Fear of foreign imports, despite the fact many goods cannot be produced in US (several reasons). Medical cost/access, despite the ACA introducing significant protections (not that it is perfect) US deficit is rapidly increasing despite a very good growth this year. Americans want action, but to "fix" some of the issues requires direct action by congress, enact rules that Republicans are abhorrent to do (meddle with a free market). Conversely the barriers to immigration is something Democrats and even some Republicans in agricultural heavy states that heavily rely on immigrant labor (like Florida) are opposed to. IMHO, #45 is simply a symptom of a massive realignment of politics in America that has been building for decades, he just is a visible indicator of that change. I fully expect the 2020 election will see an even greater realignment of positions than 2016 and even 2018. The power of the Presidency has enormously expanded under #45, and one can only think of what Henry Kissinger said. PS: These fears of loosing control, or rights, is why the pro-gun crowd is more powerful than ever too. Any candidate who runs on more gun regulation will loose.