Mangoes and South Asian fish don’t grow close to you no matter what. You don’t think bull shipping Mexican tomatoes via the ocean isn’t going to cost more than the same tomato shipped by the US land route?

If you were going to take that tariff money to build up a local tomato industry it might make sense, Canada already has a growing hot house industry. But don’t kid yourself, tariffs cost the consumer and for low margin highly seasonal and subject to going bad goods like produce is about the worst case scenario.