Foreign Affairs Minister Mélanie Joly responded in part to the U.S. president's claims by saying the U.S. is a "net exporter" of illegal fentanyl, guns and migrants to Canada.

US President Donald Trump has announced that tariffs on Canadian and Mexican imports will take effect next month, ending a temporary suspension.

Canada and Mexico have both taken steps to beef up border security, which bought them about a month's reprieve from the tariffs that could wreak havoc on a highly integrated North American economy.