Sen. Ron Wyden Ronald (Ron) Lee WydenGOP senator blocks Schumer resolution aimed at Biden probe as tensions run high Republican Senators raise concerns over Oracle-TikTok deal Hillicon Valley: TikTok, Oracle seek Trump's approval as clock winds down | Hackers arrested for allegedly defacing U.S. websites after death of Iranian general | 400K people register to vote on Snapchat MORE (D-Ore.) sent a request to Secretary of State Mike Pompeo Michael (Mike) Richard PompeoHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers Treasury Dept. sanctions Iranian government-backed hackers The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep MORE asking the department to send records on U.S. activities in Ukraine since President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE took office.

The letter asks for all State Department records regarding several individuals and their interactions with Ukraine, including the president’s personal attorney Rudy Giuliani and his former associates Lev Parnas and Igor Fruman.

The request follows Republican inquiries for State Department documentation on former Vice President Joe Biden Joe BidenCast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response Biden tells CNN town hall that he has benefited from white privilege MORE’s son Hunter Biden and the Ukrainian company he sat on the board of, Burisma. Wyden wrote that “a voluminous production of records” from those requests is expected in the coming days.

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“As the ranking Democratic member of the Senate Finance Committee, I am concerned that, in the absence of additional information concerning similar activities during the Trump administration, the Department’s production of information requested by the Senate Committees could create an incomplete and biased record of the State Department’s activities related to Ukraine,” he wrote to Pompeo.

The Oregon Democrat also asked for any documentation, including any ongoing trade negotiations with China, that references Hunter Biden’s activities in China, citing Trump’s October call to the country to investigate the former vice president’s son. The U.S. and China are in the midst of trade negotiations and had signed the first phase of a trade deal last month.

Republican lawmakers have accused Joe Biden of abusing his power to get rid of former Ukrainian Prosecutor General Viktor Shokin because he was investigating Burisma. Wyden asked the department to supply any records showing support from Congress and the international community for removing Shokin.

The State Department did not immediately respond to a request for comment.

Sen. Ron Johnson Ronald (Ron) Harold JohnsonSecond GOP senator to quarantine after exposure to coronavirus GOP-led panel to hear from former official who said Burisma was not a factor in US policy The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump contradicts CDC director on vaccine, masks MORE (R-Wis.), chairman of the Senate Homeland Security and Governmental Affairs Committee, and Sen. Chuck Grassley Charles (Chuck) Ernest GrassleySenate Republicans signal openness to working with Biden Senators offer disaster tax relief bill Trump spikes political football with return of Big Ten season MORE (R-Iowa), chairman of the Senate Finance Committee, submitted a letter on Nov. 6 asking for records regarding Hunter Biden and Burisma.

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Sen. Lindsey Graham Lindsey Olin GrahamThe Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Senate Democrats' campaign arm announces seven-figure investment to boost Graham challenger Graham: Comey to testify about FBI's Russia probe, Mueller declined invitation MORE (R-S.C.), chairman of the Senate Judiciary Committee, also sent a letter on Nov. 21 asking for this information.

Thus far, there has not been concrete evidence showing the former vice president misused his role to assist his son.

Trump had requested that Ukraine declare an investigation into the Bidens days after withholding military aid from the country, which eventually sparked an impeachment inquiry and trial. Trump was acquitted by the Senate last week.