With U.S. ties at their lowest point in modern history, Canada is turning to one of the only countries with which it had even worse relations: China. Canada is forging a "new strategic partnership" with China, its second-biggest trading partner, Prime Minister Mark Carney said Friday during what he called a "historic" trip to Beijing. That includes a break with the United States on tariffs, which have hit both the Canadian and Chinese economies. "The United States used to be a friend and ally," Guy Saint-Jacques, a former Canadian ambassador to China, told NBC News in an interview. Now, "we are treated as an enemy."