A Honduran father carries his six year-old daughter on his shoulder as he walks down a road with fellow migrants looking for law enforcement to turn themselves in and seek asylum after illegally crossing the Rio Grande near Penitas, Texas, U.S., July 28, 2019.

A Honduran father sits with his six-year-old daughter shortly after they turned themselves in to law enforcement to seek asylum with fellow migrants following an illegal crossing of the Rio Grande near Penitas, Texas, U.S., July 28, 2019.

Migrants turn themselves in to law enforcement to seek asylum after illegally crossing the Rio Grande near Penitas, Texas, U.S., July 28, 2019.

Madelen and seven year-old daughter Sophia, Venezuelan migrants, turn themselves in to law enforcement to seek asylum after illegally crossing the Rio Grande near Mission, Texas, U.S., July 25, 2019.

A constable department sergeant and deputy use binoculars to monitor the banks of the Rio Grande near a migrant crossing spot in Mission, Texas, U.S., July 25, 2019.

Madelen and seven year-old daughter Sophia, Venezuelan migrants, sit in the back of a constable department vehicle after illegally crossing the Rio Grande and turning themselves in to seek asylum near Mission, Texas, U.S., July 25, 2019.

A four-year-old migrant girl from Ecuador sits with her doll and mother (not pictured) after turning themselves in to U.S. Border Patrol agents to ask for asylum following an illegal crossing of the Rio Grande near Mission, Texas, U.S., July 26, 2019.

A migrant man holds a Homeland Security bag filled with his possessions after turning himself in to U.S. Border Patrol with fellow asylum seekers, following an illegal crossing of the Rio Grande near Mission, Texas, U.S., July 26, 2019.

An eight-year-old migrant girl's feet are seen covered in mud after crossing the Rio Grande with her family and fellow asylum seekers near Mission, Texas, U.S., July 26, 2019.

A Honduran migrant father comforts his 10-year-old daughter after turning themselves in to U.S. Border Patrol with fellow asylum seekers following an illegal crossing of the Rio Grande near Mission, Texas, U.S., July 26, 2019.

Migrants walk to a transport bus after turning themselves in to law enforcement to seek asylum following an illegal crossing of the Rio Grande near Penitas, Texas, U.S., July 28, 2019.

Migrants board a transport bus after turning themselves in to law enforcement to seek asylum following an illegal crossing of the Rio Grande near Penitas, Texas, U.S., July 28, 2019.

A constable department sergeant looks out at the Rio Grande at a migrant crossing spot near Mission, Texas, U.S., July 25, 2019.

Migrant men are apprehended by law enforcement personnel after illegally crossing the Rio Grande into the U.S. near Mission, Texas, U.S., July 25, 2019.

A U.S. Border Patrol agent detains a man from the Dominican Republic who illegally crossed the Rio Grande near Mission, Texas, U.S., July 26, 2019.

Migrant families turn themselves in to U.S. Border Patrol agents to seek asylum after illegally crossing the Rio Grande near Mission, Texas, U.S., July 26, 2019.

A four-year-old migrant girl from Ecuador stands with her mother after turning themselves in to U.S. Border Patrol agents to ask for asylum following an illegal crossing of the Rio Grande near Mission, Texas, U.S., July 26, 2019.

U.S. Border Patrol agents detain migrants who illegally crossed the Rio Grande near Mission, Texas, U.S., July 26, 2019.

Migrant men are apprehended by law enforcement personnel after illegally crossing the Rio Grande into the U.S. near Mission, Texas, U.S., July 25, 2019.

Migrant families turn themselves in to U.S. Border Patrol agents to seek asylum after illegally crossing the Rio Grande near Mission, Texas, U.S., July 26, 2019.

Migrants turn themselves in to law enforcement to seek asylum after illegally crossing the Rio Grande near Penitas, Texas, U.S., July 28, 2019.

A constable department deputy looks for migrants who illegally crossed the Rio Grande into the U.S. near Mission, Texas, U.S., July 25, 2019.

A tired Chinese migrant (L), handcuffed to a Colombian migrant, rests on the ground after unsuccessfully attempting to evade U.S. Border Patrol agents and being detained following an illegal crossing of the Rio Grande near Mission, Texas, U.S., July 26, 2019.

Migrants turn themselves in to law enforcement to seek asylum after illegally crossing the Rio Grande near Penitas, Texas, U.S., July 28, 2019.