Subpoenas

Attorney General William Barr speaks about the census as Commerce Secretary Wilbur Ross listens during an event with President Donald Trump in the Rose Garden at the White House, Thursday, July 11, 2019, in Washington. (AP Photo/Alex Brandon)

Judiciary Committee Chairman Jerrold Nadler, D-N.Y., arrives for a House Democratic caucus meeting on Capitol Hill in Washington, Wednesday, July 10, 2019. (AP Photo/Andrew Harnik)

FILE- This March 11, 2019 file photo, shows the north entrance of the Trump International in Washington D.C. A federal appeals court has ordered the dismissal of a lawsuit accusing President Donald Trump of illegally profiting off the presidency. In a significant legal victory for Trump, a three-judge panel of the 4th U.S. Circuit Court of Appeals on Wednesday, July 10, 2019, overturned a ruling by a federal judge in Maryland who ruled last year that the lawsuit could move forward. (AP Photo/Mark Tenally, File)

Attorney General William Barr speaks during a tour of a federal prison Monday, July 8, 2019, in Edgefield, S.C. (AP Photo/John Bazemore)

White House counselor Kellyanne Conway talks to reporters outside the White House, Monday, June 24, 2019, in Washington. (AP Photo/Evan Vucci)

FILE - In this June 21, 2017, file photo, Special Counsel Robert Mueller departs Capitol Hill following a closed-door meeting in Washington. The debate over special counsel Robert Mueller's report is getting new life with word that Mueller has agreed to testify publicly before two House committees. Democrats say Mueller will appear July 17 in back-to-back sessions of the Judiciary and Intelligence committees. (AP Photo/Andrew Harnik, File)

FILE - In this Sept. 14, 2005, file photo, businessman Donald Trump, left, talks on his cellphone with Felix Sater, right, outside after speaking at the Bixpo 2005 business convention at the Budweiser Events Center in Loveland, Colo. The House intelligence committee is set to interview Sater about his behind-the-scenes role in Donald Trump's effort to build a skyscraper in Moscow during the presidential election. (Cyrus McCrimmon/The Denver Post via AP)

President Donald Trump walks through the Colonnade of the White House, next to Polish President Andrzej Duda, as they arrive for a news conference in the Rose Garden, Wednesday June 12, 2019, in Washington. (AP Photo/Jacquelyn Martin)

President Donald Trump speaks during a news conference with Polish President Andrzej Duda in the Rose Garden of the White House, Wednesday June 12, 2019, in Washington. (AP Photo/Jacquelyn Martin)

House Oversight and Reform Committee Chairman Elijah E. Cummings, D-Md., joined at left by Rep. Jim Jordan, R-Ohio, the ranking member, considers whether to hold Attorney General William Barr and Commerce Secretary Wilbur Ross in contempt for failing to turn over subpoenaed documents related to the Trump administration's decision to add a citizenship question to the 2020 census, on Capitol Hill in Washington, Wednesday, June 12, 2019. (AP Photo/J. Scott Applewhite)