evidence: The final report from the House panel investigating the Jan. 6 attack on the U.S. Capitol is expected to be released on Wednesday. [...] The House Jan. 6 committee has released some introductory materials from its final report on the 2021 attack on the U.S. Capitol. The investigation dove into the scheme to keep former President Donald Trump in power after he lost the 2020 presidential election to President Biden. [...] House Speaker Nancy Pelosi appointed the Mississippi Democrat as committee chair. Thompson is also chairman of the Homeland Security Committee, in which he and Ranking Republican John Katko, R-N.Y., teamed up to pass legislation to investigate the attack on the Capitol. The measure passed the House but failed to overcome Republican opposition in the Senate.