A congressional commission is asking the Justice Department to investigate the role of Beijing after protesters claimed they were beaten and harassed by Chinese government agents in November in San Francisco during an official visit by Chinese President Xi Jinping. The protesters, who were defending the rights of Hong Kong, Tibet and ethnic Uyghurs, said their attackers’ attire, coordination and strong reaction to anti-Communist Party rhetoric indicated official Chinese involvement. Rep. Chris Smith, a New Jersey Republican who chairs the Congressional-Executive Commission on China, said Tuesday it was demanding a thorough investigation to “find out why all of these wonderful people who were peacefully protesting were hit with poles, have scars that now you know will not go away.”