John Authers is a senior editor for markets and Bloomberg Opinion columnist. A former chief markets commentator at the Financial Times, he is author of “The Fearful Rise of Markets.”

In an op-ed in the U.S. publication The Hill, Quebec Premier François Legault made the case that tariffs on Canadian imports would hurt "the American economy, many of its businesses and especially ordinary Americans by causing a new inflationary surge.

The president wants to begin renegotiating a U.S. trade deal with Canada and Mexico earlier than a scheduled 2026 review, people familiar with his thinking said.