President Donald Trump appears to moderated his threats to close the border with Mexico, though he also stated “security is more important to me than trade”. Much of the short-term risk to supply chains from slower trucking is focused on the agricultural and automotive supply chains, though these only represent 19.8% of Mexico’s $279.9 billion of truckborne exports to the U.S. in the 12 months to Feb. 28.

The electronics industry also faces significant risks, particularly given the rapid product cycles and just-in-time supply chain strategies used. Mexican exports of computers by...