Pakistan, July 11 -- In a new escalation of trade tensions, US President Donald Trump has sent a formal letter to Canadian Prime Minister Mark Carney, warning of a 35% import tax on Canadian exports beginning August 1. The warning marks a renewed push in Trump's aggressive trade policy, with similar letters reportedly sent to over 20 countries this week.

The letter follows ongoing US-Canada trade talks, which were initially targeting a July 21 deadline for reaching a deal. However, this latest development appears to push that deadline further, putting pressure on Canada and Mexico to finalize negotiations over the USMCA free trade agreement-a successor to NAFTA.

Prime Minister Carney responded via social media, saying Canada will "stand...