Tariffs to hit neighbors on Tuesday as president also pledges to impose tariffs on farm products starting in April

The US will press ahead with steep tariffs on Canada and Mexico from Tuesday, Donald Trump has said, setting the stage for a trade war with his country’s two largest economic partners.

Hours before his administration was due to hit America’s closest neighbors with sweeping import duties, the US president claimed there was “no room left” for a deal to avoid their imposition.