Prime Minister Carney says securing a truce in the long-running Canada-US lumber dispute is a top priority as Canadian producers brace for even heftier US levies as early as September. …Mr. Carney declined to say what level of baseline tariff Ottawa would accept in a new trade and security pact with Washington. …Mr. Carney was asked whether Canada would impose tariffs on US products if the US keeps a baseline levy on Canadian goods. “We’ll see what the final agreement is, if there is an agreement,” he said. …Historically, Mr. Carney said lumber deals with the US contain “some element of managed trade” such as quotas on Canadian shipments to the US. …Mr. Pellerin, a former Canadian government softwood litigator, said he thinks it would be unwise to strike a deal before litigation related to the softwood dispute plays out. There are several challenges of US duties on softwood proceeding under the United States-Mexico-Canada Agreement dispute mechanism. [This story is for Globe and Mail subscribers only]