Subpoenas

President Donald Trump leaves the Oval Office as he walks to Marine One on the South Lawn of the White House in Washington, Thursday, Nov. 14, 2019, for a short trip to Andrews Air Force Base, Md., and then on to Bossier City, La., for a campaign rally. (AP Photo/Patrick Semansky)

FILE - In this Oct. 17, 2019 file photo, acting White House chief of staff Mick Mulvaney speaks in the White House briefing room in Washington. (AP Photo/Evan Vucci, File)

FILE - In this Oct. 17, 2019 file photo, acting White House chief of staff Mick Mulvaney speaks in the White House briefing room in Washington. (AP Photo/Evan Vucci, File)

FILE - This Oct. 29, 2013 file photo shows people at Lanikai Beach, a popular neighborhood for vacation rentals, in Kailua, Hawaii. A judge has ruled that Hawaii tax authorities may subpoena Airbnb for records of its hosts as part of an investigation into whether operators of vacation rentals have been paying their taxes. Airbnb says it will hand over records of 1,000 Hawaii hosts who received the most revenue from 2016 through 2018. (AP Photo/Audrey McAvoy, File)

House Intelligence Committee Chairman Adam Schiff, D-Calif., second from right, talks with reporters on Capitol Hill in Washington, Wednesday, Nov. 6, 2019, about the House impeachment inquiry. He is joined by, from left, Rep. Gerry Connolly, R-Va., Del. Elinor Holmes Norton, D—D.C., Rep Carolyn Maloney, D-N.Y., and Rep. Mike Quigley, D-Ill.(AP Photo/Susan Walsh)

FILE - This Oct. 29, 2013 file photo shows people at Lanikai Beach, a popular neighborhood for vacation rentals, in Kailua, Hawaii. Airbnb Inc. is agreeing to provide Hawaii with records for many of its island hosts as the state tries to track down vacation rental operators who haven't been paying their taxes. Airbnb and the state Department of Taxation reached the agreement after negotiating the scope of a subpoena sought by the state. A judge approved the deal last week. (AP Photo/Audrey McAvoy, File)

President Donald Trump boards Air Force One at John F. Kennedy International Airport, Sunday, Nov. 3, 2019, in New York. (AP Photo/ Evan Vucci)

FILE - In this July 31, 2019 file photo, National security adviser John Bolton speaks to media at the White House in Washington. (AP Photo/Carolyn Kaster)

House Intelligence Committee Chairman Adam Schiff, D-Calif., speaks to reporters at the Capitol in Washington, Monday, Oct. 28, 2019. Schiff announced that former deputy national security adviser Charles Kupperman failed to appear to be interviewed in the impeachment inquiry of President Donald Trump as lawmakers try to the determine if the president violated his oath of office by asking a foreign country, Ukraine, to investigate his political opponent, former Vice President Joe Biden, and his son Hunter Biden. (AP Photo/J. Scott Applewhite)

Philip Reeker, the acting assistant secretary of state for Europe, leaves the Capitol in Washington after a closed-door interview Saturday, Oct. 26, 2019. Reeker took questions at the closed-door interview about President Donald Trump's ouster of the ambassador of Ukraine in May and whether he had knowledge about efforts to persuade Ukraine to pursue politically motivated investigations. (AP Photo/Jose Luis Magana)