LIVE: Two White House national security aides who expressed concerns about Trump Ukraine call to appear on Hill
(Mandel Ngan/AFP via Getty Images) National Security Council Director for European Affairs Alexander Vindman arrives for a closed-door deposition at the US Capitol in Washington, D.C., Oct. 29, 2019.
(Melina Mara/The Washington Post via Getty Images) After an all-day deposition behind closed doors with the House Intelligence Committee, former United States envoy to the Ukraine Kurt Volker departs the Capitol, Oct. 3, 2019.
(Susan Walsh/AP, FILE) Tim Morrison, the top Russia official on President Trump's National Security Council, gets off of an elevator as he returns to Capitol Hill in Washington, D.C., Nov. 6, 2019, to review his testimony before the House impeachment inquiry.
(J. Scott Applewhite/AP) Jennifer Williams, a special adviser to Vice President Mike Pence for Europe and Russia who is a career Foreign Service officer, arrives for a closed-door interview at the Capitol, Nov. 7, 2019.
WASHINGTON, D.C. (ABC News) -Two White House national security aides who expressed concerns about a July phone call between President Donald Trump and Ukraine’s leader are appearing on Capitol Hill Tuesday, becoming the first current White House officials to testify publicly in the Democrats’ impeachment investigation.
Army Lt. Col. Alexander Vindman, the National Security Council’s Ukraine expert, will testify alongside Jennifer Williams, a national security aide to Vice President Mike Pence, in the morning.
Both officials listened in on Trump’s July 25 phone call with Ukrainian President Volodymyr Zelenskiy. Vindman and Williams have also come under attack from the president for offering their accounts to Congress.