With some tariffs added and others removed, economists predict that big picture the changes will break even. But certain industries will still be hit hard, they say, and the tit-for-tat will weigh on business owners' confidence.

Canada struck back at Trump on Tuesday with tariffs on about $20 billion worth of U.S. goods.

Experts say Canada's new tariffs will have an outsized impact on the country's small and medium-sized businesses, with few consequences for individual consumers.