Canadian Prime Minister Mark Carney called US trade talks "nasty" after Donald Trump criticised Canada's leadership and renewed tariff threats against Canadian imports. Trump criticism on Canada’s leadershipTrump had accused Canada's leadership of being difficult during a speech in Las Vegas on Wednesday. Nasty leadership," Trump said. The remarks have also prompted many Canadians to cancel travel plans to the United States. Carney also said existing US tariffs on aluminium have already pushed aluminium prices in the United States up by 58 per cent.