Lori Chavez-DeRemer has resigned as US Secretary of Labor, the White House announced on Monday, becoming the third cabinet head to leave the Trump administration in seven weeks. White House communications director Steven Cheung said she would move to a position in the private sector, with deputy Keith Sonderling set to lead the department in the interim. Her departure follows months of mounting pressure over investigations into alleged misuse of public funds, inappropriate conduct in office, and reports of a troubled workplace environment within the department.