When White House Communications Director Hope Hicks resigned on Wednesday, she was only the the latest of a series of high-profile departures from President Donald Trump s administration.

Shes also the fourth person to vacate that specific role in a little more than a year, following Anthony Scaramucci, Sean Spicer, and Mike Dubke. Its not unusual to have some turnover after a presidents first year in office, but this White Houses revolving door is far more active than any recent administration.

Heres a partial round-up of those whove left either gracefully or with an escort since Trump took office.

Michael Flynn National Security Adviser

Trumps former National Security Adviser, Michael Flynn, resigned last February following revelations about conversations he had with then-Russian ambassador Sergey Kislyak.

Flynn has since been cooperating with Special Counsel Robert Muellers ongoing investigation into Russian meddling in the 2016 presidential election. In December, he pled guilty to lying to the FBI about his contacts with the Russian government.

Mike Dubke Communications Director

Mike Dubke served as Trumps communications director for three months between February and May, 2017 before his resignation . He wasnt an especially public figure, rarely appearing on television or talking to reporters on the record.