LyrArc Article Gist
There is a 40% drop in migrant flows through Mexico from Guatemala to the U.S. This follows action by Mexican authorites at its border with Guatemala after Mexico signed an agreement with the U.S. to control flow of migrants from Guatemala.

A recent poll by the Reforma newspaper shows 55% of Mexicans are in favor of deporting illegal immigrants, and most agree they are a burden on Mexico.  Mr. Lopez Obrador reversed an earlier policy of allowing transit of migrants from Guatemala to avoid new tariffs by president Trump on Mexican goods. Since then relations have improved between the U.S. and Mexico, and Mexico also agreed to labor protections and higher wages to protect its status as a regional hub for North America for auto production. 

The result of the deploying of the new National Guard set up by Mexico at the border with Guatemala is to dissuade migrants from making the journey.