Sen. Marsha Blackburn (R-Tenn.) got into a heated spat with a Chinese media official on Twitter on Thursday. The exchange began after Blackburn publicly thanked President Trump on the social media platform for banning cotton produced by forced Uighur labor. Beijing has faced loud international criticism over its treatment of the ethnic minority. "The U.S. will not support companies that profit off of slave labor," Blackburn wrote. In a subsequent tweet, she added, "China has a 5,000 year history of cheating and stealing. Some things will never change." Chen Weihua, chief Washington correspondent of the state-owned China Daily, snapped back...