Ontario’s recent economic success is the product of longer-run investments in universities, arts and culture; advanced research in key fields like artificial intelligence; openness to immigrants; and a growing commitment to place-making and city-building. This economic advantage will be significantly diminished if Doug Ford becomes premier of Ontario. Comparisons are already being made between Mr. Ford and Mr. Trump, as well as between Mr. Trump and Mr. Ford’s late younger brother, Rob, the original North American populist. All three positioned themselves as advocates for the “little guy,” slashing taxes and cutting back government. Like Mr. Trump, Doug Ford has even hired actors for campaign events.