Morning news brief

The Treasury secretary is set to announce a fresh wave of economic sanctions against Iran, sparking a stern warning from Tehran of "seismic" repercussions if the U.S. proceeds. This move comes amid heightened tensions, with Iran threatening severe retaliation. Adding to the complexity, Canada has announced it will impose retaliatory tariffs on the U.S. in response to these sanctions, signaling a potential strain in U.S.-Canada relations and a global ripple effect as nations navigate this geopolitical clash. This escalation underscores the delicate balance between economic pressure and international diplomacy.