House lawmakers interviewed an FBI official on Friday, part of an ongoing congressional investigation into the bureau's probe into Hillary Clinton's use of a private email server.

A congressional source confirmed to the Washington Examiner that the Judiciary and Oversight Committees met privately with FBI official Jonathan Moffa at the end of the week -- the latest in a line of interviews conducted by the joint task force looking into the FBI's controversial handling of the inquiry into the former secretary of state's unauthorized server.

Moffa was mentioned in an April letter sent to Oversight Chairman Trey Gowdy by Rep. Mark Meadows, R-N.C., who took note of emails from February 2016 that suggested Justice Department coordination with the FBI before ex-FBI Director James Comey publicly recommend in July that no charges be brought against Clinton, who was then a candidate for president.

In the letter, first reported by Fox News, Meadows pointed to emails found on Clinton's server with "Top Secret" information that indicated Comey may have misled Congress when he testified that there was no DOJ-FBI coordination at “crucial moments of the investigation.” One of those emails from an unidentified senior Justice Department official sent to Peter Strzok, the former FBI official who led the Clinton probe and was recently fired for his anti-Trump texting; Moffa, an official in the FBI’s criminal division and the bureau's Office of General Counsel; and members of the U.S. Attorney’s office for the Eastern District of Virginia, discussed being "kept in the loop as [a] response is drafted."

The Judiciary-Oversight joint task force also reportedly set up interviews with at least three other FBI officials earlier this summer, including with Bill Priestap, the assistant director of the FBI’s counterintelligence division, and Michael Steinbach, the former head of the FBI’s national security division, and John Giacalone, who preceded Steinbach.

Before the interview with Moffa, at least one Democrat -- Rep. Eric Swalwell, D-Calif., a member of the Judiciary Committee -- complained on MSNBC about the GOP focus on the Clinton emails versus the the "alarming" conduct by President Trump and the people around him at a time when Trump's longtime personal attorney Michael Cohen, facing accusations of bank fraud, pleaded guilty to tax fraud and campaign finance violations and in doing so implicated the president.

Despite protests from across the aisle, the GOP-led task force isn't done yet. According to Bloomberg, lawmakers will privately interview former top FBI lawyer James Baker on Aug. 30.

Trump and his allies have accused the DOJ and FBI of targeting him for political purposes, and GOP investigators will have a chance to further address the issue when Justice Department official Bruce Ohr testifies before the Oversight and Judiciary Committees behind closed doors on Tuesday. Ohr reportedly bypassed his superiors at the DOJ when he connected with FBI officials to share information he received from British ex-spy Christopher Steele, the author of the Trump dossier.