First Thing: Trade dispute escalates as new Canadian tariffs on US goods come into effect

Stalemate between two nations leads to tit-for-tat measures on wide range of imports. Plus: Captain Kirk recalls 60 years of Star TrekDon’t already get First Thing in your inbox? Sign up hereGood morning. Canada’s retaliatory tariffs on billions of dollars’ worth of US imports have come into effect, escalating a trade fight that has been marked by intensifying tensions between Donald Trump and Mark Carney. The tariffs range from 15% to 50% and apply to products covering $20bn in imports from the US. The measures target sectors including steel, dairy, appliances, agricultural equipment, and electronics.What tariffs did Trump impose on Canada? Last month the US president announced a new 50% tariff on cars and raw materials from Canada. He accused the country of “ripping off” the US “for year