Cargo trucks pass the secondary fence that divides the United States and Mexico in Otay Mesa, Calif., on May 31. Vice President Pence held a meeting with Mexican officials on Wednesday over threats to raise tariffs on that country.

Cargo trucks pass the secondary fence that divides the United States and Mexico in Otay Mesa, Calif., on May 31. Vice President Pence held a meeting with Mexican officials on Wednesday over threats to raise tariffs on that country.