ChainCatcher message: Canadian Ambassador to the United States, Mark Weiseman, said that Canada-U.S. trade talks broke down on the evening of the 22nd due to several issues. Weiseman said that the written text of the potential agreement differed from what Canada believed to be the consensus, and that the negotiations failed not because of any single problem. The breakdown of talks has triggered a new round of tariff measures, which could lead to an escalation of the Canada-U.S. trade dispute.