America’s container ports saw an 8% surge in inbound volumes in June, the third month of accelerating growth. A major contributor to that was likely a rush to complete deliveries ahead of the escalating tariff spat between the U.S. and China. The new duties, which start taking effect from July 6 and will likely expand, have the potential to trim the ports’ performance during the rest of the year. Long Beach and LA suffered lackluster growth of 2.3% and 4.2% respectively, possibly due to Transpacific traffic heading to the east coast first to minimize delivery timing risks. That can be...