President Donald TrumpPresident Donald Trump and first lady Melania Trump arrive for the premiere of her movie “Melania” at The John F. Kennedy Memorial Center For The Performing Arts. (AP)

President Donald Trump on Thursday threatened Canada with a 50% tariff on any aircraft sold in the US, the latest salvo in his trade war with America’s northern neighbor as his feud with Prime Minister Mark Carney expands.

Trump’s threat posted on social media came after he threatened over the weekend to impose a 100% tariff on goods imported from Canada if it went forward with a planned trade deal with China.

But Trump’s threat did not come with any details about when he would impose the import taxes, as Canada had already struck a deal.

In Trump’s latest threat, the Republican president said he was retaliating against Canada for refusing to certify jets from Savannah, Georgia-based Gulfstream Aerospace.

(This is a developing story……)