The U.S. Commission on Civil Rights is demanding to know why the Obama administration Justice Department dropped a civil complaint accusing three members of the New Black Panther Party for Self-Defense of wielding a nightstick and threatening voters at a Philadelphia polling place last Election Day. The commission, an independent body charged with investigating civil-rights complaints and making recommendations to the federal government, held a hearing on the case May 14. Thomas Perez, assistant attorney general of the Civil Rights Division of the Justice Department, gave testimony, stating that "the facts did not constitute a prosecutable violation of the federal...