US Defense secretary’s chief of staff to quit later in January

Defense Secretary Mark Esper's chief of staff, Eric Chewning, will leave the Defense Department at the end of the month, Report informs, citing TASS.

Chewning will be replaced by Jen Stewart, minority staff director for the House Armed Services Committee.

Previously, Stewart worked for Marine Gen. Joe Dunford when he was chairman of the Joint Chiefs of Staff.

Other senior defense officials have resigned in recent weeks. Among them are Randy Schriver, the assistant secretary for Asian and Pacific affairs; Kari Bingen, the principal deputy undersecretary for intelligence; Jimmy Stewart, the acting undersecretary for personnel and readiness; and Steven Walker, director of the Defense Advanced Research Projects Agency.