Mexico is preparing to significantly reinforce efforts to detain migrants who illegally cross its border with Guatemala in response to a jump in people trying to enter the United States, according to four people familiar with the matter.
The U.S. government said this week it is facing the biggest migrant surge on its border with Mexico in 20 years, presenting authorities a major challenge and sparking concerns inside the Mexican government.
The people familiar with the plan said Mexico would deploy security forces to cut the flow of migrants, the bulk of whom come . . .