By Richard Cowan, Moira Warburton and Sarah N. Lynch WASHINGTON (Reuters) -The U.S. congressional committee investigating Donald Trump’s role in the Jan. 6, 2021, attack on the Capitol opened a hearing on Thursday focusing on the pressure he put on Justice Department officials to overturn his 2020 election defeat. The U.S. House of Representatives select committee hearing began shortly after it was disclosed that federal law enforcement had raided the home of Jeffrey Clark, a Donald Trump-era Justice Department official. “Donald Trump didn’t just want the Justice Department to investigate. He …