By Eli Ridder Domestic trade and major projects will be on the agenda as Canada’s premiers gather Tuesday in Prince Edward Island for a three-day meeting coloured by a renewed tariff threat from U.S. President Donald Trump. The annual summer gathering of provincial and territorial leaders will culminate with Prime Minister Mark Carney joining the discussion Thursday. The premiers will also meet with Indigenous leaders later Tuesday. Key issues among the provinces have included efforts to cut down any remaining barriers to internal trade and advocating for big infrastructure projects that could bring investment and jobs to their regions. But there’s also fresh economic uncertainty after Trump on Monday signed an executive order to impose 50 per cent tariffs on certain Canadian products within 30 days. Senior White House officials…






