Margaret Brennan sits down with Speaker Pelosi to talk all things impeachment probe.

Who are the people who are often conducting diplomacy behind the scenes stepping forward in the highly publicized impeachment probe against President Trump?

The House impeachment inquiry, which burst into public view last week, is about to pick up speed. Eight witnesses, including Trump mega-donor and EU Ambassador Gordon Sondland, are expected to testify in the coming days. Katherine Johnson reports.

It could be a blockbuster week of testimony this week in the impeachment hearings. Eight witnesses are expected to speak publicly. The witness list includes former Ukraine envoy Kurt Volker and three people who heard first-hand the July 25th phone call that led to the impeachment inquiry. Nancy Cordes reports.

President Trump surprised his own White House staff by tweeting that he is considering submitting written testimony in the impeachment inquiry. It comes as Democrats are now investigating whether the president lied the last time he submitted answers in writing. Ben Tracy reports.

Four officials are testifying Tuesday in the public impeachment hearings, including three who have first-hand knowledge of the call at the center of the proceedings between President Trump and the president of Ukraine. But it's what State Department official David Holmes said in his closed-door testimony that is poking holes in Republicans’ defense. Nancy Cordes reports.

President Trump tweeted he would "strongly consider" offering a written testimony to the House impeachment investigators. Chief Washington correspondent Major Garrett joins "CBS This Morning" from Washington to discuss the latest on the impeachment hearings.

President Trump has slammed the impeachment inquiry as unfair. But at a cabinet meeting, he boasted that Republicans are winning the impeachment battle. Ben Tracy reports.

The second week of the House impeachment hearings is underway. The public will hear from Gordon Sondland, who has been in direct contact with the president. "Face the Nation" moderator Margaret Brennan and Major Garrett join the "CBS Evening News" to explain what we can expect.

The third round of impeachment hearings got underway on Tuesday. Two witnesses were alarmed by the president's July call with the leader of Ukraine, calling it "improper" and "unusual." Nancy Cordes has the latest.