Despite these tariff overhangs, GM CEO Mary Barra has praised the import duties. This week at the New York Times DealBook conference, she continued her support. Tariffs impact GM more than other U.S. auto companies because GM imports more than the others do.

CEO says automaker faced possibly having to cut production of gas-powered models to reach Biden administration standards if EV sales lagged.

The Trump administration is expected on Wednesday to propose weakening automobile fuel efficiency standards that were set under President Joseph R. Biden Jr. to spur the sale of electric vehicles, according to three people familiar with the plan.

Automakers rode concerns about the threat of tariffs to a record-setting pace in the first three quarters of the year. Thanks to pressure from the White House, automakers tried their best to keep prices down,