(Reuters) - Witnesses have testified behind closed doors and in public in the Democratic-led U.S. House of Representatives impeachment inquiry into whether Republican President Donald Trump abused the power of his office when he sought foreign interference against a political rival.

FILE PHOTO: Former U.S. ambassador to Ukraine Marie Yovanovitch arrives to testify in the U.S. House of Representatives impeachment inquiry into U.S. President Trump on Capitol Hill in Washington, U.S., October 11, 2019. REUTERS/Jonathan Ernst/File Photo

Following are witnesses scheduled for public testimony:

Friday, Nov. 15 - Marie Yovanovitch, former U.S. ambassador to Ukraine abruptly removed by Trump in May.

Tuesday, Nov. 19 - Morning: Jennifer Williams, an aide to Vice President Mike Pence, and Lieutenant Colonel Alexander Vindman, who serves as the director for European affairs at the National Security Council; Afternoon: Ambassador Kurt Volker, the former U.S. special envoy to Ukraine, and Tim Morrison, a White House aide with the National Security Council focusing on Europe and Russia policy.

Wednesday, Nov. 20 - Morning: Ambassador Gordon Sondland, U.S. Ambassador to the European Union. Afternoon: Laura Cooper, the deputy assistant secretary of defense for Russian, Ukrainian, and Eurasian Affairs and David Hale, the under secretary of state for political affairs

Thursday, Nov. 21 - Morning: Fiona Hill, former National Security Council senior director for Europe and Russia.

Witnesses who testified as public hearings began on Nov. 13:

Wednesday, Nov. 13 - George Kent, the deputy assistant secretary of state for European and Eurasian affairs, and William Taylor, the top U.S. diplomat in Ukraine.

Witnesses who gave depositions behind closed doors:

Slideshow ( 6 images )

Oct. 3 - Kurt Volker

Oct. 11 - Marie Yovanovitch

Oct. 14 - Fiona Hill

Oct. 15 - George Kent

Oct. 16 - Michael McKinley, former policy adviser to Secretary of State Mike Pompoe

Oct. 17 - Gordon Sondland

Oct. 22 - William Taylor

Oct. 23 - Laura Cooper

Oct. 26 - Philip Reeker, acting assistant secretary of state for European and Eurasian affairs

Oct. 29 - Alexander Vindman

Oct. 30 - Catherine Croft, former adviser to Volker on Ukraine policy

Oct. 30 - Christopher Anderson, former specialist on Ukraine at the State Department.

Oct. 31 - Timothy Morrison

Nov. 6 - David Hale

Nov. 7 - Jennifer Williams

Witnesses asked to testify behind closed doors - it was not certain whether they would agree to:

Nov. 15 - David Holmes, the top political affairs officer at the U.S. embassy in Kiev

Nov. 16 - Mark Sandy, director of national security programs at the Office of Management and Budget.