Sen. Elizabeth Warren (D-Mass.) has sent letters to Undersecretary of Defense Ellen Lord and Secretary of the Navy Richard Spencer requesting updates on their efforts to ensure Department of Defense contractors are complying with federal worker protection laws.

DOD spends hundreds of billions of dollars each year on goods and services provided by contractors and subcontractors. The Federal Acquisition Regulation requires that contracts be awarded only to “responsible prospective contractors.” But some companies, Warren alleges including major Navy contractors, have been caught seriously endangering their workers while still continuing to receive massive federal contracts.