President Donald Trump called Canadian officials "nasty" and reiterated his call for America's northern neighbor to become the 51st state.

Trump, speaking to Fox News host Laura Ingraham in an interview, called the people who worked for Canada's former Prime Minister Justin Trudeau "nasty".

"I deal with every country, indirectly or directly. One of the nastiest countries to deal with is Canada," Trump said.

He also said: "Canada was meant to be the 51st state because we subsidize Canada by $200 billion a year."

Mark Carney, an economist and former governor of the Bank of England, recently replaced Trudeau as Canada's prime minister.

The U.S. and Canada are locked in a new trade war that began when Trump imposed fresh tariffs.

This is a developing story and more information will be added soon.