Trump Impeachment Inquiry

Philip Reeker, acting assistant secretary of state for Europe, arrives Oct. 26 for a closed-door interview at the Capitol in Washington, D.C. Jose Luis Magana/AP hide caption

Mark Sandy, a career employee in the White House Office of Management and Budget, testified in the House impeachment inquiry on Nov. 16. J. Scott Applewhite/AP hide caption

Secretary of State Mike Pompeo says "many countries" are working to undermine American democracy. He adds: "To protect our elections, America should leave no stone unturned." Alex Brandon/AP hide caption

President Trump spoke before pardoning the National Thanksgiving Turkey during a ceremony in the Rose Garden on Tuesday. Trump has until 6 p.m. on Dec. 1 to notify the House Judiciary Committee of any plans to participate in the upcoming public hearing on impeachment. Saul Loeb/AFP via Getty Images hide caption

On Monday, a federal judge ruled that former White House counsel Don McGahn must testify to House lawmakers who have subpoenaed him, in the face of White House orders that McGahn not comply. Above, McGahn arrives for an event at the Justice Department in May. Andrew Harnik/AP hide caption

House Intelligence Committee Chairman Adam Schiff, D-Calif., leaves during a break in testimony of the House Intelligence Committee on Capitol Hill in Washington. Jacquelyn Martin/AP hide caption

New documents show Secretary of State State Mike Pompeo had contact with President Trump's personal lawyer Rudy Giuliani weeks before the U.S. Ambassador to Ukraine was recalled. Markus Schreiber/AP hide caption

Fiona Hill, the National Security Council's former senior director for Europe and Russia, and David Holmes, an official from the U.S. Embassy in Ukraine, testified in the House impeachment inquiry Thursday. Matt McClain/Pool/Getty Images hide caption

Fiona Hill (left), the National Security Council's former senior director for Europe and Russia, and David Holmes, an official from the American Embassy in Ukraine, are sworn in to testify before the House Intelligence Committee in the Longworth House Office Building on Capitol Hill on Thursday. Chip Somodevilla/Getty Images hide caption

Former White House national security aide Fiona Hill and David Holmes, a U.S. diplomat in Ukraine, return from a break to continue their testimony before the House Intelligence Committee on Thursday. Andrew Harnik/AP hide caption

Gordon Sondland, the U.S ambassador to the European Union, departs for a short break while testifying before the House Intelligence Committee in the Longworth House Office Building on Capitol Hill on Wednesday. Drew Angerer/Getty Images hide caption

U.S. Ambassador to the European Union Gordon Sondland testified behind closed doors in the impeachment inquiry last month. He returns Wednesday. Patrick Semansky/AP hide caption

Jennifer Williams (right) and Lt. Col. Alexander Vindman are sworn in to testify before the House Intelligence Committee on Capitol Hill on Tuesday. Jacquelyn Martin/AP hide caption

"Was there a 'quid pro quo'?" Ambassador to the European Union Gordon Sondland said in his opening remarks to House Intelligence Committee."With regard to the requested White House call and White House meeting, the answer is yes." Win McNamee/Getty Images hide caption