President Donald Trump's threats to impose punishing tariffs on Canada and Mexico may be part of a strategy to gain leverage ahead of new negotiations on a regional trade agreement, experts said.

Trump plans 25% tariffs on Canada, Mexico. What will it mean for Iowa's economy, farmers? Last time it left a $2 billion dent

As U.S. President Donald Trump mulls imposing 25% duties on imports from Canada and Mexico on Feb. 1, focus has shifted to the sectors likely to bear the brunt of the tariffs. About 28%, or about $844 billion,