A career White House security office employee turned to Congress as her “last hope,” telling lawmakers that more than two dozen denials for security clearances have been reversed during the Trump administration.

Tricia Newbold, who has served under both Democratic and Republican presidents, told the House Oversight and Reform Committee she and her colleagues have issued 25 denials for security clearance applications that were later overturned despite red flags, according to a letter from Chairman Elijah Cummings, D-Md.

Newbold claims she was retaliated against for warning her superiors that the clearances “were not always adjudicated in the best interest of national security.”

“[T]his is my last hope to really bring the integrity back into our office,” she told the committee in an interview.

The House Oversight Committee is scrutinizing clearances obtained by President Trump’s daughter Ivanka Trump and her husband Jared Kushner, who both serve as senior White House advisers. National security adviser John Bolton’s clearance is also under review by the committee.

Cummings said the committee will begin issuing subpoenas for information regarding its investigation into the security clearance process at the White House as soon as Tuesday.

“In light of the grave reports from this whistleblower — and the ongoing refusal of the White House to provide the information we need to conduct our investigation — the Committee now plans to proceed with compulsory process and begin authorizing subpoenas, starting at tomorrow’s business meeting,” he wrote in a letter to the White House.

According to reports earlier this year, Trump ordered his then-chief of staff John Kelly to give Kushner a top secret clearance. Kelly documented the request in writing.

Newbold was previously suspended for two weeks after a report said Kushner’s clearance was approved despite objections of career staff.

Ranking member Jim Jordan, R-Ohio, accused Cummings of using the matter as “a pretense for a partisan attack on the White House.”

“Chairman Cummings' investigation is not about restoring integrity to the security clearance process, it is an excuse to go fishing through the personal files of dedicated public servants,” he said in a statement.

Jordan said Republican members of the committee were informed of Newbold’s interview less than 24 hours before it happened and had little time to prepare.