Canada's Prime Minister Justin Trudeau and Mexico's President Claudia Sheinbaum were quick to respond to US President Donald Trump's tariffs with their own measures, with the tit-for-tat moves likely to impact global supply chains significantly. Trudeau said Canada will impose 25 per cent tariffs on Canadian $155 billion in US imports, adding that Canadian $30 billion would take effect from Tuesday and the rest in 21 days. China too vowed "corresponding countermeasures" against the new tariffs.'