President Joe Biden’s outgoing administration is finalizing rules on Tuesday that will effectively bar nearly all Chinese cars and trucks from the U.S. market, as part of a crackdown on vehicle software and hardware from China.

Washington’s latest move against Chinese vehicles comes after the Commerce Department said this month it was considering a similar crackdown on Chinese-made drones, in the wake of last year’s steep tariff hikes on imports of its electric vehicles.

“It’s really important because we don’t want two million Chinese cars on the road and then realize … we have a threat,” Commerce Secretary Gina Raimondo told Reuters in an interview, citing national security concerns.