On Monday, Charles Kupperman, President Trump's former deputy national security adviser, failed to appear for his deposition in the House impeachment inquiry. After receiving a Congressional subpoena on Friday, Kupperman was told not to show up by White House lawyers who invoked “constitutional immunity.” That same day, Kupperman filed a lawsuit asking a federal judge to determine whether he is required to testify. Garrett Haake, MSNBC Washington Correspondent, discusses the options Congress has when a witness defies a subpoena and how Kupperman’s response could affect the potential testimony of John Bolton.

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

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

Further reading:

• Trump national security official asks judge whether he has to testify in impeachment probe
• Ex-Trump deputy national security adviser Kupperman a no-show for impeachment testimony

As evidence mounts against President Donald Trump, Senate Republicans, led by Majority Leader Mitch McConnell, are attempting to undermine proceedings by criticizing the House process. This week, McConnell co-sponsored a resolution, alongside Senator Lindsey Graham, claiming the inquiry denies President Trump "basic fairness and due process.” McConnell is careful, however, when confronted with allegations about the President’s conduct with Ukraine. Frank Thorp V, Producer and Off-Air Congressional Reporter for NBC News, breaks down McConnell’s impeachment strategy and what options he may have if the inquiry comes to a Senate trial.

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

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

Further reading:

• Graham unveils measure slamming impeachment inquiry

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.

Bill Taylor, the current US Ambassador to Ukraine, is set to appear before the House Intelligence, Oversight, and Foreign Affairs Committees on Tuesday. Taylor is likely to be asked about his concerns about a possible Trump-Ukraine quid pro quo. "I think it's crazy to withhold security assistance for help with a political campaign," Taylor wrote in a September text message exchange. Leigh Ann Caldwell explains why Taylor’s deposition could be a lynchpin for House investigators. Our guest host, Carrie Dann, fills in for Steve Kornacki.

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

For transcripts and further reading, check out https://www.nbcnews.com/articletwo.

Seven witnesses have now appeared before Congressional committees to share what they know about the Trump administration’s dealings with Ukraine. But why is so much of this process behind closed doors? Will the public ever learn what was said? Julia Ainsley, NBC News Correspondent covering the Department of Justice and the Department of Homeland Security, explains the political calculation behind the Democrats’ decision to conduct most of their inquiry in private.

Questions about the impeachment process? Email us at [email protected].

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

The latest developments in the impeachment inquiry: what’s happening now in Washington and why it matters for the rest of the country. Powered by NBC News journalists. Hosted by Steve Kornacki, National Political Correspondent - NBC News and MSNBC. Mondays, Wednesdays, and Fridays with bonus episodes for breaking news.