A US congressional commission is pressing President Donald Trump to confront his Chinese counterpart Xi Jinping over detained Americans when the leaders meet this week, warning that silence would leave Beijing free to “use human beings as bargaining chips”. The Congressional-Executive Commission on China (CECC), in a letter to Trump dated May 7, aired concerns over the growing threat arising from the Communist Party’s use of “hostage diplomacy, coercive exit bans and transnational repression”...