A U.S. Border Patrol agent searches for undocumented migrants after they illegally crossed the Rio Grande near Palmview, Texas, U.S., April 6, 2019. Picture taken April 6, 2019. REUTERS/Loren Elliott TPX IMAGES OF THE DAY

U.S. Border Patrol agents search for undocumented migrants after they illegally crossed the Rio Grande near Palmview, Texas, U.S., April 6, 2019. Picture taken April 6, 2019. REUTERS/Loren Elliott

U.S. Border Patrol agents search for undocumented migrants after they illegally crossed the Rio Grande near Palmview, Texas, U.S., April 6, 2019. Picture taken April 6, 2019. REUTERS/Loren Elliott

A U.S. Border Patrol agent searches for undocumented migrants after they illegally crossed the Rio Grande near Palmview, Texas, U.S., April 6, 2019. Picture taken April 6, 2019. REUTERS/Loren Elliott

The U.S.-Mexico border in the Rio Grande (L) is seen next to the U.S.-Mexico border fence (C) and a canal (R) in El Paso, Texas, U.S., March 6, 2019. REUTERS/Lucy Nicholson

A Guatemalan woman shows her ankle monitor, which most adult migrants are required to wear pending their asylum hearings, in a motel used as a temporary migrant shelter in Tucson, Arizona, U.S., November 30, 2018. REUTERS/Nicole Neri SEARCH "NERI MONASTERY" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

U.S. Representative Alexandria Ocasio-Cortez (D-NY) wipes away tears as Representative Ilhan Omar (D-MN) talks about her own experience as a refugee during a news conference to call on Congress to cut funding for ICE (Immigration and Customs Enforcement), at the U.S. Capitol in Washington, U.S. February 7, 2019. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY

U.S. Representative Alexandria Ocasio-Cortez (D-NY) wipes away tears as Representative Ilhan Omar (D-MN) talks about her own experience as a refugee during a news conference to call on Congress to cut funding for ICE (Immigration and Customs Enforcement), at the U.S. Capitol in Washington, U.S. February 7, 2019. REUTERS/Jonathan Ernst

U.S. Representative Alexandria Ocasio-Cortez (D-NY) wipes away tears as Representative Ilhan Omar (D-MN) talks about her own experience as a refugee during a news conference to call on Congress to cut funding for ICE (Immigration and Customs Enforcement), at the U.S. Capitol in Washington, U.S. February 7, 2019. REUTERS/Jonathan Ernst

U.S. Representative Alexandria Ocasio-Cortez (D-NY) wipes away tears as Representative Ilhan Omar (D-MN) talks about her own experience as a refugee during a news conference to call on Congress to cut funding for ICE (Immigration and Customs Enforcement), at the U.S. Capitol in Washington, U.S. February 7, 2019. REUTERS/Jonathan Ernst

U.S. Representative Alexandria Ocasio-Cortez (D-NY), with Representative Rashida Tlaib (D-MI), wipes away tears as Representative Ilhan Omar (D-MN) talks about her own experience as a refugee during a news conference to call on Congress to cut funding for ICE (Immigration and Customs Enforcement), at the U.S. Capitol in Washington, U.S. February 7, 2019. REUTERS/Jonathan Ernst

U.S. Representative Alexandria Ocasio-Cortez (D-NY) and Representative Rashida Tlaib (D-MI) wipe away tears as Representative Ilhan Omar (D-MN) talks about her own experience as a refugee during a news conference to call on Congress to cut funding for ICE (Immigration and Customs Enforcement), at the U.S. Capitol in Washington, U.S. February 7, 2019. REUTERS/Jonathan Ernst

Clothes hung and displayed with words reading "You are not alone " are seen near a tent city in Texas for migrant teens, which the U.S. government on Friday said will be closed, next to the Mexican border in Tornillo, Texas, U.S,. January 12, 2019. REUTERS/Jose Luis Gonzalez

Siblings from Central America seeking asylum hold hands as they walk down a dirt road after illegally crossing the Rio Grande river into the U.S. from Mexico in Penitas, Texas, U.S., January 10, 2019. REUTERS/Adrees Latif

Migrant families seeking asylum from Honduras and Guatemala walk down a dirt road after illegally crossing the Rio Grande river into the U.S. from Mexico in Penitas, Texas, U.S., January 10, 2019. REUTERS/Adrees Latif TPX IMAGES OF THE DAY

Migrant families seeking asylum from Honduras and Guatemala walk down a dirt road after illegally crossing the Rio Grande river into the U.S. from Mexico in Penitas, Texas, U.S., January 10, 2019. REUTERS/Adrees Latif

The border wall divides Tijuana, Mexico on the left and San Diego County, California, U.S. November 17, 2018. Picture taken November 17, 2018. REUTERS/Adrees Latif

A migrant man from Central America illegally crosses into San Diego County, California from the outskirts of Tijuana, Mexico on November 19, 2018. November 19, 2018. REUTERS/Adrees Latif

Migrant men from Central America are detained for illegally crossing into the United States from Mexico in Penitas, Texas, U.S., October 5, 2018. Picture taken October 5, 2018. REUTERS/Adrees Latif

Ruben Garcia, head of Annunciation House, an organization that helps immigrants, refugees and activists, holds a news conference regarding the death of Jakelin Caal, a 7-year-old Guatemalan girl who died in U.S. custody after she crossed illegally from Mexico to the U.S., in El Paso, U.S. December 15, 2018. REUTERS/Jose Luis Gonzalez

Ruben Garcia, head of Annunciation House, an organization that helps immigrants, refugees and activists, holds a news conference regarding the death of Jakelin Caal, a 7-year-old Guatemalan girl who died in U.S. custody after she crossed illegally from Mexico to the U.S., in El Paso, U.S. December 15, 2018. REUTERS/Jose Luis Gonzalez

The hand of a U.S. Marine is shown as he helps install concertina wire at the U.S. Mexico border in preparation for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

Concertina wire installed by U.S. Marines is shown along U.S. Mexico border in preparation for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

Military helicopters fly overhead as U.S. Marines deploy concertina wire at the U.S. Mexico border in preparation for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

Military helicopters fly overhead as U.S. Marines deploy concertina wire at the U.S. Mexico border in preparation for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

Concertina wire is shown where vehicles enter the United States from Mexico as authorities prepare for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

Concertina wire installed by U.S. Marines is shown along U.S. Mexico border in preparation for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

U.S. Marines deploy concertina wire at the U.S. Mexico border in preparation for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

Concertina wire is shown as vehicles enter the United States from Mexico as authorities prepare for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

Concertina wire installed by U.S. Marines is shown along U.S. Mexico border in preparation for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

Military helicopters fly overhead as U.S. Marines deploy concertina wire at the U.S. Mexico border in preparation for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

Concertina wire installed by U.S. Marines is shown along U.S. Mexico border in preparation for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

Military helicopters fly overhead as U.S. Marines deploy concertina wire at the U.S. Mexico border in preparation for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

The hand of a U.S. Marine is shown as he helps install concertina wire at the U.S. Mexico border in preparation for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S. November 15, 2018. REUTERS/Mike Blake

A bottle discarded by a migrant crossing the desert is seen near Ajo in Pima County, Arizona, U.S., September 10, 2018. REUTERS/Lucy Nicholson

A backpack left by a migrant is seen in the desert in Pima County, Arizona, U.S., September 8, 2018. REUTERS/Lucy Nicholson

A backpack left by a migrant is seen in the Sonoran Desert in Pima County, Arizona, U.S. September 8, 2018. REUTERS/Lucy Nicholson SEARCH "SONORAN DESERT" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

An insole from a shoe likely left by a migrant crossing the desert is seen in Pima County, Arizona, U.S., September 12, 2018. REUTERS/Lucy Nicholson

Concertina wire barricades wait to be installed along the U.S. Mexico border in preparation for the arrival of a caravan of migrants at the San Ysidro border crossing in San Diego, California, U.S., November 13, 2018. REUTERS/Mike Blake

Aden Hussein Hassan holds his daughter Asmo, 2 days, inside their apartment in Columbus, Ohio, U.S., August 8, 2018. Picture taken August 8, 2018. To match Special Report USA-IMMIGRATION/REFUGEES REUTERS/Shannon Stapleton

Aden Hussein Hassan poses outside his apartment in Columbus, Ohio, U.S., August 8, 2018. Picture taken August 8, 2018. To match Special Report USA-IMMIGRATION/REFUGEES REUTERS/Shannon Stapleton

Aden Hussein Hassan poses outside his apartment in Columbus, Ohio, U.S., August 8, 2018. Picture taken August 8, 2018. To match Special Report USA-IMMIGRATION/REFUGEES REUTERS/Shannon Stapleton

Aden Hussein Hassan with his daughter Asmo, 2 days, son Mohammed, 4, and daughter Adno, pose for a picture inside their apartment in Columbus, Ohio, U.S., August 8, 2018. To match Special Report USA-IMMIGRATION/REFUGEES REUTERS/Shannon Stapleton

Aden Hussein Hassan holds his daughter Asmo, 2 days inside their apartment in Columbus, Ohio, U.S., August 8, 2018. Picture taken August 8, 2018. To match Special Report USA-IMMIGRATION/REFUGEES REUTERS/Shannon Stapleton

Witnesses are sworn in during a Senate Judiciary Committee hearing entitled "Oversight of Immigration Enforcement and Family Reunification Efforts" on Capitol Hill in Washington, U.S., July 31, 2018. Carla Provost, Acting Chief of the United States Border Patrol, Matthew Albence, Executive Associate Director Enforcement And Removal Operations U.S. Immigration and Customs Enforcement, Commander Jonathan D. White, U.S. Public Health Service Commissioned Corps, James R. McHenry III, Director Executive Office For Immigration Review at the Department of Justice, and Jennifer Higgins, Associate Director Refugee, Asylum And International Operations Directorate, U.S. Citizenship and Immigration Services, Department of Homeland Security. REUTERS/Allison Shelley

Witness Jennifer Higgins, Associate Director Refugee, Asylum And International Operations Directorate, U.S. Citizenship and Immigration Services, Department of Homeland Security, speaks during a Senate Judiciary Committee hearing entitled "Oversight of Immigration Enforcement and Family Reunification Efforts" on Capitol Hill in Washington, U.S., July 31, 2018. REUTERS/Allison Shelley

The U.S. Mexico border is shown with Juarez, Mexico on left and pom the right El Paso, Texas, U.S. June 18, 2018. REUTERS/Mike Blake

Automobiles pass through the U.S. border and into the United States from Juarez, Mexico in El Paso, Texas, U.S. June 18, 2018. REUTERS/Mike Blake

Automobiles pass through the U.S. border and into the United States from Juarez, Mexico in El Paso, Texas, U.S. June 18, 2018. REUTERS/Mike Blake

U.S. Senator Kamala Harris greets baby Dimitri Alvarado as she and U.S. Representative Pramila Jayapal (D-WA) (2nd L) participate in a news conference to show support for immigration and refugee policies for families at the U.S. Capitol in Washington, U.S., May 23, 2018. REUTERS/Jonathan Ernst

Marta Alvarado holds her baby Dimitri as she participates in a news conference with lawmakers including U.S. Senator Kamala Harris to show support for immigration and refugee policies for families at the U.S. Capitol in Washington, U.S., May 23, 2018. REUTERS/Jonathan Ernst

U.S. Senator Kamala Harris speaks with reporters after participating in a news conference to show support for immigration and refugee policies for families at the U.S. Capitol in Washington, U.S., May 23, 2018. REUTERS/Jonathan Ernst

U.S. Senator Kamala Harris departs after participating in a news conference to show support for immigration and refugee policies for families at the U.S. Capitol in Washington, U.S., May 23, 2018. REUTERS/Jonathan Ernst

U.S. Senator Kamala Harris departs after participating in a news conference to show support for immigration and refugee policies for families at the U.S. Capitol in Washington, U.S., May 23, 2018. REUTERS/Jonathan Ernst

Wimber Htoo sits down to discuss travel and resettlement in Garden City, Kansas, U.S., March 27, 2018. Picture taken March 27, 2018. REUTERS/Adam Shrimplin

Amy Longa looks over paper work with Wimber Htoo (R) and Htoo Lwae Say (L) at the IRC office in Garden City, Kansas, U.S., March 26, 2018. Picture taken March 26, 2018. REUTERS/Adam Shrimplin

Wimber Htoo and Htoo Lwae Say walk off the plane at Garden City Regional Airport in Garden City, Kansas, U.S., February 15, 2018. Picture taken February 15, 2018. REUTERS/Adam Shrimplin

Wimber Htoo's knife that he brought with him to the United States in his home in Garden City, Kansas, U.S., March 27, 2018. Picture taken March 27, 2018. REUTERS/Adam Shrimplin

Htoo Lwae Say shows some of the items she brought with her to the United States in her home in Garden City, Kansas, U.S., March 27, 2018. Picture taken March 27, 2018. REUTERS/Adam Shrimplin

Wimber Htoo sits down to discuss travel and resettlement, in Garden City, Kansas, U.S., March 27, 2018. Picture taken March 27, 2018. REUTERS/Adam Shrimplin