EXCLUSIVE — Freight railroad companies are pressuring the Biden administration to abandon a proposed rule they say could further complicate the country’s supply chain problems.

The Department of Transportation’s Federal Railroad Administration currently allows freight railroad companies to set their own crew requirements, but the Biden administration is seeking to implement a regulation first proposed in 2016 by the Obama administration that would permanently require all freight trains to operate with traditional engineer-conductor teams. Former President Barack Obama left office before the rule could be finalized.