An increasing number of American citizens have been apprehended as they have tried to smuggle illegal drugs into the U.S. since the start of the coronavirus pandemic, an uptick that’s come amid travel restrictions at the border with Mexico.
For more than a year, the closure of the southern border to nonessential traffic has sharply limited the number of foreign citizens entering the U.S. by land. The rules have been extended until at least June 21, but Mexican authorities have allowed most U.S. citizens to walk or drive south across the border with . . .