The biggest drivers of the migrant exodus were in place before López Obrador took office and the first massive caravan of migrants formed last year, months before he took office. A first huge caravan of migrants crossed Mexico headed for the U.S. border in November, before López Obrador took office. In April, the United States began slowing border crossings by reassigning border inspection personnel to deal with the influx of migrants already inside the United States. When López Obrador took office, detentions of migrants were relatively low, with 5,884 migrants deported in January. But many migrants say they either don't feel safe in Mexico, or they want to join relatives already in the United States.

Source: Fox News May 31, 2019 20:48 UTC