
US Secretary of State Marco Rubio headed Wednesday to Canada on the highest-level visit by the administration of President Donald Trump, who has unleashed a trade war described by the United States' neighbour as an existential challenge.
Rubio is attending Group of Seven talks of foreign ministers in Charlevoix, Quebec, where he plans to press the club of industrial democracies -- unified in backing Ukraine after Russia's 2022 invasion -- to support Trump's approach of pushing both Moscow and Kyiv to make concessions.