Schumer's words imply that he previously HAD confidence in Trump -- this despite every indication that Trump was, is, and always will be absolutely untrustworthy.  I seriously doubt whether anyone in Canada's government has confidence in anything other than lies, bullying, bluster, and self-centered greed on Trump's part, but the nasty reality is that Canada must deal with him somehow.  There's a huge difference between mistrusting someone and  demonstrating that mistrust with words or actions that provoke reactions that might exacerbate already-likely damage to Canada. It's dangerous enough living next door to a feral elephant; an elephant in must is a truly terrifying prospect.