In testimony on Tuesday, Bill Taylor, the top US diplomat in Ukraine, described what he saw as a high-stakes decision by President Trump to withhold $391 million in aid to Ukraine. Dan De Luce, national security and global affairs reporter for the NBC News investigative unit, recounts Taylor’s opening statement and whether it support the theory of a “quid pro quo.” And, NBC Justice Correspondent Pete Williams joins Steve Kornacki to answer a listener question on what happens if a witness lies to Congress.

Have questions about the impeachment inquiry? Email us at [email protected].

Further reading:

• ‘Never Trump’ Republican to represent Bill Taylor, diplomat at center of impeachment inquiry
• House Democrats look for paper trail on blocked military aid to Ukraine

For a transcript, please visit https://www.nbcnews.com/articletwo.