There is no census, and migrants come and go, but the majority of people in La Soledad appear to be from Venezuela, the once-wealthy South American nation that has seen an exodus of more than 7 million amid an economic, social and political crackup.

In Mexico City, some migrants have built tent cities and slept on the streets. In a country long sympathetic to migrants, neighbors are protesting.

Migrants in Mexico who were hoping to go to the U.S. are adjusting to a new reality after President Donald Trump began a border crackdown last week.