Delta Associate General Counsel Scott McClain told a hearing that the airline was contractually obligated to pay for any tariffs imposed. He said the U.S. tariffs "will not punish the foreign producer because we can’t avoid those orders now."

Instead, it would force Delta to pay what he called an "unexpected tax" that would harm the airline, its employees and its customers.

(Reporting by Andrea Shalal; editing by Jonathan Oatis)