US President Donald Trump on Tuesday promised to treat Canada fairly in talks over punishing US tariffs on Canadian goods, but was less committed about a continental trade deal that also includes Mexico. "I think they're going to walk away very happy," Trump said, referring to Canada, in Oval Office remarks ahead of a meeting with Canadian Prime Minister Mark Carney to discuss trade. "We're going to treat people fairly. We're going to especially treat Canada fairly." Trump, complaining that "we're the king of being screwed" by trading partners, said Washington would continue to target some Canadian exports. Carney, making his second visit to the White House in five months, is under increasing pressure to address US tariffs on steel,...