Love him or loathe him, Donald Trump has made a difference

Start with tariffs. Donald Trump has upended a trading system that disadvantaged America, in the process alienating allies who weep at the loss of their ability to restrict the access of US goods to their markets. Using access to the unparalleled American market as a lure — club, if you prefer — Trump estimated that he has attracted promises of trillions in investment in the American economy, and added $300 billion (£225 billion) annually in tariff revenues to the Treasury's coffers. He also told a Fox interviewer that he uses tariffs as a weapon to secure peace deals: "I can…