Top Treasury aide heading to Blackstone Group

Washington (CNN Business)Treasury Secretary Steven Mnuchin's chief of staff, Eli Miller, is heading to the private sector.

Miller, a former Trump campaign official, will be joining The Blackstone Group, the private equity firm headed by Trump supporter Stephen Schwarzman.
The hire was first reported by Axios and confirmed to CNN by a Blackstone spokeswoman.
Mnuchin tweeted last week about Miller's departure:
    Along with Miller, Treasury's top spokesman Tony Sayegh is also planning to leave the Department, Politico reported on Friday.
      On Tuesday, House Democratic Rep. Mike Quigley, D-Illinois, asked whether the departures reflected staffing issues inside Treasury.
      "I don't believe we have," Mnuchin replied. "We have not lost staff due to issues."