Watch Live: Fiona Hill, David Holmes Testify in Impeachment Inquiry

House Intelligence Chairman Adam Schiff (D-Calif.) intervenes to voice his concern about keeping the whistleblower's identity secret as Ranking Member Devin Nunes (R-Calif.) questions National Security Council Director for European Affairs Lt. Col. Alexander Vindman during testimony before the House Intelligence Committee in the Longworth House Office Building on Capitol Hill in Washington on Nov. 19, 2019. Shawn Thew-Pool/Getty Images

Fiona Hill, President Donald Trump’s former top Russia adviser on the National Security Council, and David Holmes, the counselor for political affairs at the U.S. Embassy in Ukraine, testified on Thursday before Congress.

Hill read a lengthy statement before the House Intelligence Committee, claiming that “U.S. support for Ukraine—which continues to face armed Russian aggression—has been politicized.”