Lenovo has indicated that U.S. tariffs on imports of Chinese-manufactured computer servers may help it vs. the competition as it produces the machines in Mexico as well as China. One sign of that success is a 14.8% jump in exports of its servers from Mexico to the U.S. in the third quarter vs. a year earlier.

Laptop computers are not yet subject to duties, but could become so in January. That would be a bigger challenge for Lenovo given it imports them almost exclusively from China. Lenovo may have accelerated seaborne shipments of laptops from China to the U.S. by 86.8% in the...