U.S. President Donald Trump has warned that if the European Union and Canada take steps that harm the American economy, the U.S. will impose large-scale tariffs on exports to both markets, surpassing previous plans. Canadian Prime Minister Mark Carney recently visited London and Paris to strengthen trade ties in response to escalating tensions with Washington. His trip is widely seen as a direct reaction to Trump’s trade policies, particularly U.S. tariffs on imported steel and aluminum. “Trump’s influence looms over Carney’s visit,” said Nelson Wiseman, an honorary professor at the University ...