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Top FBI official Bill Priestap to retire

A top FBI official who had a role in overseeing investigations into both Hillary ClintonHillary Diane Rodham ClintonGorsuch rejects Minnesota Republican's request to delay House race Biden leads Trump by 6 points in Nevada: poll The Memo: Women could cost Trump reelection MORE and the Trump campaign will retire at the end of the year.

Bill Priestap, who currently serves as assistant director of the FBI's counterintelligence division, will leave the bureau after 20 years, The Wall Street Journal reported Tuesday. 

His departure is unrelated to the 2016 investigations and the questions that have been raised about them, the Journal reported.

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The FBI said in a statement to the newspaper that Priestap “became eligible to retire and has chosen to do so after 20 years of service."

Priestap was involved in the FBI's investigation into Russian interference in the 2016 election and whether Russians colluded with the Trump campaign, and he was also part of the bureau's investigation into Clinton's use of a private email server while she was secretary of State.

When Priestap leaves the FBI, there will be no high-ranking officials who were involved in both investigations left at the bureau, according to the Journal.

President TrumpDonald John TrumpGiuliani goes off on Fox Business host after she compares him to Christopher Steele Trump looks to shore up support in Nebraska NYT: Trump had 7 million in debt mostly tied to Chicago project forgiven MORE fired former FBI director James ComeyJames Brien ComeyGOP former US attorneys back Biden, say Trump 'threat to rule of law' Biden's polling lead over Trump looks more comfortable than Clinton's Trump has list of top intelligence officials he'll fire if he wins reelection: report MORE last year, while Deputy Director Andrew McCabeAndrew George McCabeHillicon Valley: CEOs of Google, Facebook and Twitter to testify before Senate | European Union police agency warns of increase in cybercrime | Twitter to remove posts hoping for Trump's death Graham officially schedules hearing on Trump's Supreme Court pick to start Oct. 12 The Hill's 12:30 Report: Trump eager to leave the hospital MORE was fired in March by Attorney General Jeff SessionsJefferson (Jeff) Beauregard SessionsGOP former US attorneys back Biden, say Trump 'threat to rule of law' Biden fact checks Trump on 545 families separated at border, calls policy 'criminal' Harris walks fine line on Barrett as election nears MORE.

Counterintelligence agent Peter Strzok was fired in August after facing criticism for sending critical texts about Trump during the 2016 campaign. Priestap supervised Strzok before he was fired. 

Trump has been highly critical of the FBI and the Department of Justice while he has served as president, frequently saying that there should be further investigations into Clinton and that the Russia probe should come to an end.