Donald Trump's trade adviser on Sunday blamed Canada for the failure to finalize a reboot of the North American Free Trade Agreement and suggested the country's prime minister is headed to hell for crossing the U.S. leader.

"We'd have a great deal with NAFTA by now if the Canadians would spend more time at the bargaining table and less time lobbying Capitol Hill, and our press and state governments here," Peter Navarro said in an interview on "Fox News Sunday." "They are just simply not playing fair. Dishonest. Weak."

Navarro also said "there's a special place in hell" for any foreign leader engaging in "bad faith diplomacy" with Trump, referring to Canadian Prime Minister Justin Trudeau.