Early Saturday, 50 percent tariffs took effect on roughly $20 billion worth of Canadian products after trade talks collapsed in Washington. [1] Ottawa answered within hours. Prime Minister Mark Carney says Canada will match the tariffs "dollar for dollar" starting Sept. 8. [1]

The basket reads like a shopping trip. Three proclamations — aimed nominally at motor vehicles, dairy, and alcohol — reach far past those sectors: phones, cameras, monitors and GPS units; upholstered seating and wooden tables; leather luggage, handbags, belts and gloves; milk powders, whey and bakery mixes; beer, wine and spirits; hockey sticks and pads; wooden cutting boards. [2] The duties apply regardless of USMCA preference. Energy, potash, fish and critical minerals stay exempt. [2] The alcohol proclamation exists because most provinces already halted American liquor sales in an earlier round. [2]

Two weeks ago these same tariffs were suspended after a last-minute deal; Friday's collapse switched them back on. [1] Matching dollar for dollar is the point — retaliation calibrated to be felt in the same aisles. [1] The consumer impact will arrive quietly, not in headlines — a pricier bottle of Niagara red, a rink bag costing more by Christmas, furniture quotes creeping upward at the showroom.

In Washington this is an enforcement story. In Ottawa it is a grocery-run story. The shopper pays both ways.

-- MAYA CALLOWAY, New York