Trudeau and Trump clashed this week at the NATO Summit in London. Trump called out Trudeau for not meeting Canada's NATO spending commitments, and things got nasty when Trudeau was caught on camera mocking Trump at a Buckingham Palace event. Trump called Trudeau "two-faced" and departed the summit early, leaving many to wonder whether Trudeau could have handled the situation better. Dr. Brian Lee Crowley, managing director with the Macdonald-Laurier Institute, says he understands why Trudeau did what he did, but says Trudeau needs to be much more guarded, especially when dealing with a leader as volatile as Trump. Crowley joins John now to discuss the tense summit, and how Trudeau can improve Canada's somewhat-strained relationship with the USA.