After big Democratic primary losses, Bernie Sanders listed issues he'd like Joe Biden to address at their one-on-one debate on Sunday. Mary Altaffer/AP hide caption

House Speaker Nancy Pelosi, D-Calif., announced at the Capitol on Thursday that the House is drafting articles of impeachment against President Trump. Chip Somodevilla/Getty Images hide caption

Twelve Democratic candidates are facing off in the fourth primary debate of the 2020 campaign on Tuesday in Westerville, Ohio. Angela Hsieh/NPR hide caption

President Trump speaks during a cabinet meeting at the White House on June 21, 2018. Just over a year later, he's had turnover in the departments of Justice, Interior, Homeland Security, Defense, Labor, and a number of lower agencies. Win McNamee/Getty Images hide caption

Special counsel Robert Mueller speaks about the investigation into Russian interference in the 2016 presidential election, at the Justice Department on Wednesday. Mandel Ngan/Getty Images hide caption

Secretary of Homeland Security Kirstjen Nielsen is leaving her post, President Trump announced Sunday. Here she testifies on Capitol Hill on March 6. Jim Watson/AFP/Getty Images hide caption

Michael Cohen, President Trump's former personal attorney and fixer, will testify publicly on Capitol Hill next week about payments to women who say they had affairs with Trump. Cohen will report to prison in May for crimes related to those payments. Eduardo Munoz Alvarez/Getty Images hide caption

Union members and other federal employees protest in front of the White House on Thursday. Many are out of work as the partial government shutdown has dragged on longer than any in history. Pablo Martinez Monsivais/AP hide caption

House Speaker-designate Nancy Pelosi, D-Calif., and Senate Minority Leader Chuck Schumer, D-N.Y., address reporters about the fight over funding a border wall before the partial government shutdown. Pelosi will lead House Democrats in voting on a bill to reopen the government when they take power in the House on Thursday. J. Scott Applewhite/AP hide caption

Judge Brett Kavanaugh testifies during a Senate Judiciary Committee hearing on September 27. Pool/Getty Images hide caption

Sen. Jeff Flake arrives back at the Senate Judiciary Committee hearing on Thursday following a break. After announcing Friday morning that he would vote to confirm Brett Kavanaugh to the Supreme Court, Flake was confronted in an emotional scene by two women relaying their stories of sexual assault. Drew Angerer/Getty Images hide caption

The Senate Judiciary Committee hearing room is prepared for Thursday's planned testimony from Christine Blasey Ford and Judge Brett Kavanaugh. J. Scott Applewhite/AP hide caption

Attorney General Jeff Sessions at an event discussing immigration policies on Sept. 10. President Trump said on Tuesday that he's disappointed in the attorney general's job performance for a number of reasons, beyond his recusal from the Russia investigation. J. Scott Applewhite/AP hide caption