The federal government released a list of six items to be banned by the end of 2021.
The prime minister is staying put in Ottawa, his office confirms.
He was appointed to the coveted role in 2016.
"We have very different perspectives."
Even large diversified mining companies are getting out of the business of coal.
"This had nothing to do with our NAFTA negotiation," the foreign affairs minister says.
The matter "continues to be of concern to Canadians," he says.
"We are having discussions around the interpretation of a variety of things."
Canada's U.S. envoy says the PM won't appear with the president unless tariffs are lifted.
The prime minister suggested USCMA could be ratified even if tariffs stay in place.