The Truth-o-Meter says: Mostly True | Donald Trump says Canada levies 270 percent tariff on dairy. That's basically right In the run-up to a stormy meeting of the G-7 group of advanced industrial nations, President Donald Trump zeroed in on a specific trade policy by the meeting’s host, Canada. In fact, he tweeted about it four times over four days, culminating in a rant about "fool trade." The target: Canadian trade barriers on imported milk.