Washington (CNN) Steve Linick, the State Department's inspector general, is set to hold an "urgent" briefing Wednesday with senior congressional staff members after Secretary Mike Pompeo Tuesday accused lawmakers of "intimidating and bullying" State Department officials by calling them for depositions related to the Ukraine inquiry.

The meeting comes hours after Pompeo admitted earlier Wednesday that he was on the July 25 phone call in which President Donald Trump asked Ukrainian President Volodymyr Zelensky to investigate Joe Biden, though this is no evidence of wrongdoing by the former vice president.

Although Linick serves at the pleasure of the President, there are safeguards to prevent him from being quickly removed. "The President must communicate the reasons for the action in writing to both Houses of Congress at least 30 days before the removal or transfer," according to the Council of the Inspectors General on Integrity and Efficiency.

"These safeguards are meant to prevent IGs from being removed for political reasons or simply because they are doing an effective job of identifying fraud, waste, and abuse," it said.

Linick, who was appointed to his post in September 2013 has a history of serving in oversight positions. At the State Department he oversaw the investigation into former Secretary of State Hillary Clinton's use of a private email server.

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