Canada's former leader Chrétien has blunt advice for Trump: ‘Give your head a shake!'
FILE - President Donald Trump, center, reaches out to Mexico's President Enrique Pena Nieto, left, and Canada's Prime Minister Justin Trudeau as they prepare to sign a new United States-Mexico-Canada Agreement that is replacing the NAFTA trade deal during a ceremony at a hotel before the start of the G20 summit in Buenos Aires, Argentina, on Nov. 30, 2018.