Canada's top diplomat in Washington spent Monday morning playing therapist to a room full of anxious business leaders. Ambassador Mark Wiseman addressed the Canadian Club Toronto, urging everyone to "take a deep breath" as the CUSMA renewal window opens July 1. He made clear that the date isn't an expiration—it's a starting gun for negotiations that could see the pact extended to 2042. Even if no renewal happens, the agreement remains locked in until 2036,...