The Trump administration may have tried to bar former acting Attorney General Sally Yates from testifying at a House Intelligence Committee hearing on its Russia investigation, according to a letter from her lawyer obtained by NBC News.

In a letter to White House counsel dated Friday, Yates’ lawyer said she intended to testify at the hearing despite Trump administration concerns that the information she shared could be covered by executive privilege. The lawyer, David O’Neil, wrote that there may not be a reason for Yates to withhold information related to former National Security Advisor Michael Flynn’s contacts with Russia because top Trump administration officials have already discussed the situation publicly.

In a separate letter to O’Neil, Associate Deputy Attorney General Scott Schools wrote that Yates’ testimony is “likely covered by the presidential communications privilege and possibly the deliberative process privilege.” He added, though, that Yates did not need the Justice Department’s consent to testify, only the consent of the White House.

The Washington Post first reported the story. On Tuesday, White House press secretary Sean Spicer called the newspaper’s report “100 percent false.” He said the White House never took action to stop her from testifying.

“I hope she testifies. I look forward to it,” Spicer told reporters during his daily briefing.

Yates in January warned the White House that Flynn could be vulnerable to blackmail after he made incorrect statements about his contacts with Sergey Kislyak, the Russian ambassador to the United States. Flynn resigned in February, which the White House said was due to the contradictory statements he made to Vice President Mike Pence.

President Donald Trump fired Yates after she told Justice Department lawyers not to defend Trump’s first executive order restricting travel from seven Muslim-majority countries.

The House panel’s Republican chairman, Rep. Devin Nunes of California, canceled the Russia hearing on the same day the letter is dated. It was originally set for Tuesday.

Democrats have criticized the neutrality of the committee’s investigation into alleged Russian interference in the 2016 election and possible ties between the Trump campaign and Moscow due to Nunes’ recent actions.

The intelligence committee’s ranking Democrat, Rep. Adam Schiff of California, called on Monday for Nunes to recuse himself from “any investigation” into Trump’s campaign and transition team. Nunes admitted that he met with an unidentified source on the White House grounds to review intelligence reports ahead of his claim that Trump transition members’ communications were “incidentally” swept up by U.S. intelligence officials.

He faces criticism for not telling Schiff about the White House visit.

On Friday, Nunes’ spokesman told MSNBC that the White House “had no input” in his decision to cancel the hearing with Yates.

Congress is looking into Trump’s unsubstantiated claim that the Obama administration wiretapped him as part of its Russia probe.