Ex-top Trump Russia aide to testify about 'shadow policy' on Ukraine: report

President TrumpDonald John TrumpPelosi eyes end of April to bring a fourth coronavirus relief bill to the floor NBA to contribute 1 million surgical masks to NY essential workers Private equity firm with ties to Kushner asks Trump administration to relax rules on loan program: report MORE's former top assistant working on European and Russian issues will reportedly testify to Congress that Trump's top lawyer, Rudy GiulianiRudy GiulianiSunday shows preview: As coronavirus spreads in the U.S., officials from each sector of public life weigh in Biden campaign blasts Twitter for refusing to sanction retaliatory 'hoax' Trump ad Google to spend .5 million in fight against coronavirus misinformation MORE, and his associates set up a shadow foreign policy for the Trump administration relating to Ukraine that circumvented the National Security Council (NSC).

NBC News reported Thursday that Fiona Hill, a former special assistant to the president, will tell House lawmakers that Giuliani and Trump's ambassador to the European Union, Gordon Sondland, went around the NSC and official White House procedures to speak to the president about Ukraine.

ADVERTISEMENT

Hill's attorney did not immediately return a request for comment from The Hill.

Her impending testimony is said to have caused worry in the White House, as Hill's tenure as one of Trump's top advisers stretches to the earliest months of his presidency.

Hill left the Trump administration in June after serving under two national security advisers, H.R. McMaster and John BoltonJohn BoltonChina sees chance to expand global influence amid pandemic Trump ignores science at our peril Bolton defends decision to shutter NSC pandemic office MORE, the latter of whom was ousted from the Trump administration last month.

Considered by many to be a top expert on Russian President Vladimir PutinVladimir Vladimirovich PutinOvernight Energy: Oil giants meet with Trump at White House | Interior extends tenure of controversial land management chief | Oil prices tick up on hopes of Russia-Saudi deal Oil prices tick up on hopes of Russia-Saudi deal The Hill's Morning Report - Presented by Facebook - Guidance on masks is coming MORE, Hill is the first former White House official to agree to comply with House Democrats' impeachment inquiry.

The probe was launched in response to a controversial conversation between the president and Ukraine's President Volodymyr Zelensky during which Trump pressed Zelensky to investigate former Vice President Joe BidenJoe BidenSome Sanders top allies have urged him to withdraw from 2020 race: report Sunday shows preview: As coronavirus spreads in the U.S., officials from each sector of public life weigh in Trump defends firing of intel watchdog, calling him a 'disgrace' MORE, a top 2020 Democratic contender for president.

The White House has opted to use executive privilege to stop officials from testifying before Congress, but it remains legally unclear if the president can force former officials who are now private citizens from testifying.