KEY POINTS
  • House Intelligence Chairman Adam Schiff says former national security adviser John Bolton's deputy Charles Kupperman may be held in contempt.
  • Kupperman was subpoenaed to testify in the impeachment inquiry into President Trump.
  • Kupperman filed a lawsuit Friday asking a judge to rule whether he must comply with the Trump administration or with the congressional subpoena for his testimony.
U.S. House Intelligence Committee Chairman Rep. Adam Schiff (D-CA) speaks to members of the media outside a closed session before the House Intelligence, Foreign Affairs and Oversight committees at the U.S. Capitol on October 28, 2019 in Washington, DC. Also pictured are (L-R) Rep. Carolyn Maloney (D-NY), Rep. Jamie Raskin (D-MD) and Rep. Eric Swalwell (D-CA).

House Intelligence Chairman Adam Schiff said Monday that former national security adviser John Bolton's deputy Charles Kupperman may be held in contempt after he failed to comply with a subpoena to testify in the impeachment inquiry into President Donald Trump.

"Witnesses like Dr. Kupperman need to do their duty and show up," Schiff told reporters after Kupperman failed to appear for a scheduled deposition.