He was charged by the House officially by two articles of impeachment, charging Clinton with lying under oath to a federal grand jury and obstructing justice. On September 9, 1998, the special prosecutor submitted to Congress a 445-page, sexually graphic report. The Starr Report found “substantial and credible” evidence of presidential wrongdoing, prompting the House of Representatives on October 8 to begin a wide-ranging impeachment inquiry of the president. Thirty-one Democrats joined the Republicans in supporting the investigation. On December 19, 1998, William Jefferson Clinton became the second president to be impeached by the House of Representatives. The House officially approved two articles of impeachment, charging Clinton with lying under oath to a federal grand jury and obstructing justice. House Speaker Newt Gingrich led the effort to impeach the president over the Lewinsky scandal—even though he himself was secretly engaged in an adulterous affair with a congressional staffer.