All three witnesses have been testifying behind closed doors in recent weeks, but Wednesday's hearings will be the first time Americans will hear directly from them.
- At 14:30 ET, the committee is scheduled to begin its hearing with Cooper and Hale, although it depends on whether the first hearing is completed on time.
How can I look?
CNN Hearing Coverage will be streamed with immediate analysis by CNN, CNN International and CNN en Español and will be streamed live on desktop and mobile workstations on CNN.com, as well as on mobile devices through apps on CNN for iOS and Android. [1
The chairman of the committee, Democratic reporter Adam Schiff of California and the most supreme Republican of the Council, reporter Devin Nunez of California, will begin the hearings with opening statements.
The witnesses will then be sworn in and have to make their opening statements.
Additional circles of questions are possible. Each committee member will then be given five minutes to ask the witness questions.
Who is Gordon Sundland?
US Ambassador to the European Union Sundland has been central to the House of Democrats' investigation of President Donald Trump and Ukraine over his involvement in a political campaign in the "shadow" in Ukraine at the request of the president.
Probably Sundland will be subject to control over Trump's recently-revealed telephone conversation the day after Trump's July 25 conversation with Ukrainian President Vladimir Zelensky and his September 1 conversation in Warsaw, Poland, with Supreme Assistant Zelensky.
Who is Laura Cooper?
Cooper is the only witness to the Pentagon to testify so far as part of the Democratic impeachment of the Trump-Ukraine House of Inquiry.
Cooper said Volcker told her during a meeting that he was trying to remove the aid hold, with the Ukrainians making a public statement that they would launch investigations sought by Trump.
Who is David Hale?
He was the executive assistant to then-Secretary of State Madeleine Albright during the Clinton administration.
He was US ambassador to Yordan n in 2005, ambassador to Lebanon from 2013 to 2015 and ambassador to Pakistan from 2015 to 2018.
Chandelis Duster, Devan Cole, Jeremy Diamond, and Kaitlan Collins of CNN to this report.