The Treasury Department has complied with Republican senators’ requests for highly sensitive and closely held financial records about Hunter Biden and his associates and has turned over "’evidence’ of questionable origin" to them, according to a leading Democrat on one of the committees conducting the investigation.

For months, while the impeachment controversy raged, powerful committee chairmen in the Republican-controlled Senate have been quietly but openly pursuing an inquiry into Hunter Biden’s business affairs and Ukrainian officials’ alleged interventions in the 2016 election, the same matters that President Trump and his personal lawyer Rudy Giuliani unsuccessfully tried to coerce Ukraine’s government to investigate.

Unlike Trump and Giuliani, however, Sens. Charles Grassley, chairman of the Finance Committee; Ron Johnson, chairman of the Homeland Security and Governmental Affairs Committee; and Lindsey Graham, chairman of the Judiciary Committee, have focused their efforts in Washington, seeking to extract politically useful information from agencies of the U.S. government. They’ve issued letters requesting records from Cabinet departments and agencies, including the State Department, the Treasury, the Justice Department, the FBI, the National Archives and the Secret Service.