Trudeau warns of reopening negotiations as trade deal in US Congress Canadian Prime Minister Justin Trudeau says he respects the process the US Congress must go through to ratify a new trade deal between the US, Canada and Mexico, but warns that a reopening of NAFTA "may lead to worse outcomes for Canadians" and "lengthy further negotiations". Speaking to reporters following meetings with US President Donald Trump, Trudeau also says the two discussed the arrest and detention of two Canadians in China. IMAGES AND SOUNDBITES