Tensions are rising in a trade dispute. New tariffs are set to be imposed on Canadian cars and steel, with a rate of 50% planned. This move is expected to take effect in January.

The decision comes after trade negotiations between the U.S. and Canada broke down. Details of the negotiations and the events leading up to the breakdown are not specified here.

Further information on the trade dispute and the impending tariffs can be found through the source. The announcement marks an escalation in the trade war, but specific implications and responses are not outlined in the available information.