The renomination of Donald Trump makes him only the second president who could win nonconsecutive terms. This induces me to return to my annual attempt to explain to Canadian Trump-haters the sources of the present stark division in American politics. In 2015, Donald Trump was almost the only prominent American who detected the level of discontent in the lower half of American income earners. Donald Trump had been polling comprehensively across the United States for years. He saw the political implications of these figures and concluded that the bipartisan consensus in Washington was failing a steadily larger number of Americans.