Tariffs atop tariffs? White House says levies on Canada would be cumulative

If the U.S. were to proceed with all the tariffs it’s threatening next month, there’s no way they’d all be compounded atop each other into one astronomical total, right? Wrong, says the Trump administration. The White House said Tuesday that should all its trade actions take effect in March, it would indeed pile tariff on top of tariff, to reach the larger number of 50 per cent on some items. At the moment, the U.S. is threatening two actions: a worldwide tariff of 25 per cent on steel and aluminum starting March 12, and it has also paused, until March…