How Trump’s tariffs are snarling supply chains

Despite signs of a thaw earlier this week, Washington and Beijing are locked in a standoff on tariffs, and global supply chains are feeling the pressure.

Disruption from tariffs is occurring at multiple points in commercial supply lines — from factory floors in East Asia, through the shipping and transportation industry, at U.S. ports of entry, and by U.S. retailers who are warning of empty shelves.

A quick resolution with Beijing, while desirable for U.S. importers, could spell additional interference...