Lawmakers are urging Washington to sanction Chinese officials over possible crimes against humanity the same week that Beijing legalized its policy of mass detentions of Uighur Muslims. In an annual report released Wednesday, the bipartisan Congressional-Executive Commission on China (CECC) said that Beijing’s long-standing repression of the Uighur Muslim minority is worsening. As many as 1 million Uighurs in the western frontier region of Xinjiang may have been forced into a vast network of detention camps in what the commission calls “the largest incarceration of an ethnic minority population since World War II.” Until an about face this week, China had denied the large-scale detention of minorities and rejected foreign criticisms as hyperbole.