U.S. House of Representatives Speaker Nancy Pelosi, a longtime critic of China’s human rights record, on Wednesday threw her influence behind bipartisan legislation to require the Trump administration to certify Beijing is maintaining its special treatment of Hong Kong. U.S. lawmakers’ move to protect the “one country, two systems” relationship that mainland China has with Hong Kong, which formerly was under British control, comes amid massive demonstrations in Hong Kong against a proposed extradition law.