As someone on the border, the tariffs do screw over individual folks on both sides of it.
Canadian grocery prices are awfully high and they've been known for various price-fixing scandals (the Loblaws bread-fixing apology gift cards come to mind) so there's often a lot of Canadian Walmart/Sams Club/Local Grocery shoppers.
One of the odd things is that Americans had it better coming back to the US from Canada after a day out shopping - we could bring back $800, but the Canadians going home could only bring back $50 or so, unless they were out for more than 48 hours then got $800. US Customs was also hilariously lax on actually enforcing things ("anything to declare?" "ah, I spent $200 at IKEA" gets a handwave) compared to the Canadians that'll fine-tooth comb the vehicle to pull every penny of duty they can coming home to Canada.