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