U.S. Supply Chain Struggles to Adapt as Delays Worsen

Nike Inc. doesn’t have enough sneakers to sell for the holidays. Costco Wholesale Corp. is reimposing limits on paper towel purchases. Prices for artificial Christmas trees have jumped 25% this season.

Despite mounting shipping delays and cargo backlogs, the busiest U.S. port complex shuts its gates for hours on most days and remains closed on Sundays. Meanwhile, major ports in Asia and Europe have operated round-the-clock for years.