Sen. Marco Rubio (R-FL) on Wednesday called on Congress to give the U.S. a stronger hand in trade negotiations with China – and said he would introduce a bill to crack down on Beijing next week. “As the U.S. delegation negotiates with China over trade, Congress should further strengthen America’s position by making China’s unwillingness to deal on issues of substance as painful as possible,” Rubio wrote in a Washington Post op-ed . “That’s why next week I will...