OTTAWA—Home buyers and builders in Canada are in retreat, adding to the woes of an economy struggling under the weight of President Trump’s tariffs. Housing helped spur growth in Canada just prior to, and after the worst of, the Covid-19 pandemic. …Data this month indicated existing-home sales climbed modestly for three straight months as of June. But economists and real estate agents are far from convinced it signals recovery after a tariff-fueled slowdown. They note the sales rebound was the result of sellers cutting their listing price. Housing affordability remains stretched in Canada, according to the Bank of Canada data. …For builders, prices for new homes are failing to cover higher costs for labor, loans and taxes and fees set at the municipal level. The Canadian Home Builders’ Association said its own confidence index is at historically pessimistic levels. [to access the full story a WSJ subscription is required]