Special Counsel investigation into Russia's interference in 2016 U.S. Elections

U.S. Rep. Jerrold Nadler, D-N.Y., chair of the House Judiciary Committee, speaks during a news conference, Thursday, April 18, 2019, in New York. (AP Photo/Mary Altaffer)

Special Counsel Robert Mueller departs Easter services at St. John's Episcopal Church, Sunday, April 21, 2019, in Washington. (AP Photo/Andrew Harnik)

FILE - In this Tuesday, May 29, 2018 file photo, Rudy Giuliani, an attorney for President Donald Trump, waves to people during White House Sports and Fitness Day on the South Lawn of the White House, in Washington. Trump’s legal team, through an unlikely combination of bluster, legal precedent and a decision to sharply shift tactics, protected their client from a perilous in-person interview and those lawyers took a victory lap this week when a redacted version of special counsel Robert Mueller findings was published, (AP Photo/Andrew Harnik, File)

President Donald Trump and his accompanying motorcade vehicles arrive at Trump International Golf Club, Friday, April 19, 2019 in West Palm Beach, Fla. (AP Photo/Pablo Martinez Monsivais)

Marine One with President Donald Trump aboard, departs the South Lawn of the White House, Thursday, April 18, 2019, for a short trip to Andrews Air Force Base, Md. President Trump is traveling to his Mar-a-lago estate to spend the Easter weekend in Palm Beach, Fla. (AP Photo/Andrew Harnik)

President Donald Trump waves during his arrival with first lady Melania Trump on Air Force One at Palm Beach International Airport, Thursday, April 18, 2019, in West Palm Beach, Fla. Trump traveled to Florida to spend the Easter weekend as his Mar-a-Lago estate. (AP Photo/Pablo Martinez Monsivais)

IN this April 1, 2019, file photo, Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., speaks during the We the People Membership Summit in Washington. Warren has become the first 2020 Democratic presidential candidate to make a full-throated call for the House of Representatives to begin impeachment proceedings against President Donald Trump after the release of special counsel Robert Mueller’s redacted report. (AP Photo/Jose Luis Magana, File)

U.S. Rep. Jerrold Nadler, D-N.Y., chair of the House Judiciary Committee, speaks during a news conference, Thursday, April 18, 2019, in New York. (AP Photo/Mary Altaffer)

FILE - In this May 15, 2017, file photo, President Donald Trump shakes hands with Abu Dhabi's crown prince, Sheikh Mohammed bin Zayed Al Nahyan, in the White House in Washington. Sheikh Mohammed, one of the most-powerful leaders in the United Arab Emirates, has found himself entangled in special counsel Robert Mueller's report on U.S. President Donald Trump and Russian interference in America's 2016 election. (AP Photo/Andrew Harnik, File)

FILE - In this Feb. 22, 2018, file photo White House counsel Don McGahn speaks at the Conservative Political Action Conference (CPAC), at National Harbor, Md. McGahn was barely on speaking terms with President Donald Trump when he left the White House last fall. But special counsel Robert Mueller's report released Thursday, April 18, 2019, reveals the president may owe his former top lawyer a curious debt of gratitude. (AP Photo/Jacquelyn Martin, File)