How can airlines curb bad behavior? Start by providing better service.

WASHINGTON, D.C. — Even the highest court in the land could not convince Donald Trump to stray from his love of tariffs. The U.S. president’s year-long imposition of tariffs under the International Emergency Economic Powers Act was brought to a halt by the Supreme Court last Friday, much to his chagrin — and to the thrill of importers around the globe. Within hours, however, Trump responded angrily, declaring he was “ashamed” of the high court and imposing a 10 per cent global tariff under Section 122 of the Trade Act of 1974, which enables the White House to address significant...