Subpoenas

In this Aug. 12, 2017, photo, Rob Porter, left, White House Staff Secretary, speaks to President Donald Trump after Trump made remarks regarding the ongoing situation in Charlottesville, Va., at Trump National Golf Club in Bedminister, N.J. The White House has instructed Porter and another former aide to President Donald Trump not to appear at a House Judiciary Committee hearing Tuesday, Sept. 17, 2019, saying Porter and Rick Dearborn are "absolutely immune" from testifying at what the panel is calling its first impeachment hearing. (AP Photo/Pablo Martinez Monsivais)

FILE - In this Thursday, Sept. 12, 2019, file photo, President Donald Trump pauses as he speaks at the 2019 House Republican Conference Member Retreat Dinner in Baltimore. New York City prosecutors have subpoenaed President Donald Trump's tax returns, a person familiar with the matter said Monday, Sept. 16. The person was not authorized to speak publicly and did so on condition of anonymity. (AP Photo/Carolyn Kaster, File)

Cars pass Purdue Pharma headquarters Thursday, Sept. 12, 2019, in Stamford, Conn. For months, the judge overseeing national litigation over the opioids crisis urged all sides to reach a settlement that could end thousands of lawsuits filed by state and local governments. But the chaotic developments this week in the case against OxyContin maker Purdue Pharma underscore how difficult that goal is. (AP Photo/Frank Franklin II)

FILE - In this July 24, 2019, file photo, House Intelligence Committee Chairman Adam Schiff, D-Calif., speaks during a hearing on Capitol Hill in Washington. The chairman of the House intelligence committee has issued a subpoena to the acting Director of National Intelligence, saying that he is withholding a whistleblower complaint from Congress. (AP Photo/Susan Walsh, File)

FILE - In this Oct. 7, 2016, file photo a flag for Deutsche Bank flies outside the German bank's New York offices on Wall Street. Deutsche Bank revealed in court papers on Tuesday, Aug. 27, 2019, that it has tax records Congress is seeking in its investigation into President Trump's finances. (AP Photo/Mark Lennihan, File)

FILE - In this April 26, 2019, file photo, National Rifle Association President Col. Oliver North speaks at the National Rifle Association Institute for Legislative Action Leadership Forum at Lucas Oil Stadium in Indianapolis. New York's attorney general's office is questioning North on Tuesday, Aug. 20, 2019, as it probes whether the NRA broke laws governing its nonprofit status. (AP Photo/Michael Conroy, File)

FILE - In this Oct. 11, 2018, file photo, adult film actress Stormy Daniels arrives for the opening of the adult entertainment fair Venus in Berlin. Just weeks after federal prosecutors revealed they were through investigating hush money paid to protect President Donald Trump from allegations of adultery, the probe has been picked back up by state prosecutors in New York City. A subpoena delivered Thursday, Aug. 1, 2019, to the Trump Organization, was for records related to payments that former Trump attorney Michael Cohen helped arrange to Daniels after she claimed she had an affair with Trump. (AP Photo/Markus Schreiber, File)