Johnson said that answers to the problems of trade between Northern Ireland and the rest of the U.K. That would bring legal action from the EU, and potentially economic sanctions that could spiral into a trade war. has threatened to trigger an emergency break clause in the deal that lets either side suspend the agreement in extreme circumstances if there is no solution soon. ROME (AP) - Prime Minister Boris Johnson on Friday renewed Britain’s threat to break from part of the Brexit divorce deal that he signed with the European Union unless a dispute over Northern Ireland trade is resolved.