The world's worst crooks and killers should be running scared. The law and the executive order President Donald Trump issued make it much easier for the U.S. government to single out and punish egregious cases of abuse. Included in the list were Artem Chayka, the son of the prosecutor general of Russia; Gao Yan, a senior Chinese security official; and Maung Maung Soe, who oversaw Burmese military atrocities against ethnic Rohingya.