White House, DHS chief ‘horrified’ by images of US Border Patrol on horseback confronting migrants

Migrants wade across the Rio Grande from Del Rio, Texas, to Ciudad Acuña, Mexico, Sunday, Sept. 19, 2021. The U.S. is flying Haitians camped in a Texas border town back to their homeland and blocking others from crossing the border from Mexico in a massive show of force that signals the beginning of what could be one of America's swiftest, large-scale expulsions of migrants or refugees in decades. (AP Photo/Felix Marquez)

Haitian migrants use a dam to cross into the United States from Mexico, Saturday, Sept. 18, 2021, in Del Rio, Texas. The U.S. plans to speed up its efforts to expel Haitian migrants on flights to their Caribbean homeland, officials said Saturday as agents poured into the Texas border city where thousands of Haitians have gathered after suddenly crossing into the U.S. from Mexico. (AP Photo/Eric Gay)

Migrants wade across the Rio Grande from Del Rio, Texas, to Ciudad Acuña, Mexico, Sunday, Sept. 19, 2021. The U.S. is flying Haitians camped in a Texas border town back to their homeland and blocking others from crossing the border from Mexico in a massive show of force that signals the beginning of what could be one of America's swiftest, large-scale expulsions of migrants or refugees in decades. (AP Photo/Felix Marquez)

U.S. Customs and Border Protection mounted officers attempt to contain migrants as they cross the Rio Grande from Ciudad Acuña, Mexico, into Del Rio, Texas, Sunday, Sept. 19, 2021. Thousands of Haitian migrants have been arriving to Del Rio, Texas, as authorities attempt to close the border to stop the flow of migrants. (AP Photo/Felix Marquez)

Haitian migrants gather on the banks of the Rio Grande after they crossed into the United States from Mexico, Saturday, Sept. 18, 2021, in Del Rio, Texas. U.S. President Joe Biden's administration is nearing a final plan to expel many of the thousands of Haitian migrants who have suddenly crossed into the Texas border city from Mexico and to fly them back to their Caribbean homeland. (AP Photo/Eric Gay)

Haitian migrants part of the group of people from Haiti waiting in Del Rio and Ciudad Acuña to get access to the United States cross the Rio Grande toward Ciudad Acuña, Mexico to get supplies, Friday, Sept. 17, 2021, in Ciudad Acuña, Mexico. Haitians crossed the Rio Grande freely and in a steady stream, going back and forth between the U.S. and Mexico through knee-deep water with some parents carrying small children on their shoulders. Unable to buy supplies in the U.S., they returned briefly to Mexico for food and cardboard to settle, temporarily at least, under or near the bridge in Del Rio, a city of 35,000 that has been severely strained by migrant flows in recent months. (Marie D. De Jesús/Houston Chronicle via AP)

Haitian migrants use a dam to cross into and from the United States from Mexico as well as bathe and do laundry, Saturday, Sept. 18, 2021, in Del Rio, Texas. The U.S. plans to speed up its efforts to expel Haitian migrants on flights to their Caribbean homeland, officials said Saturday as agents poured into a Texas border city where thousands of Haitians have gathered after suddenly crossing into the U.S. from Mexico. (AP Photo/Eric Gay)

Haitian migrants bathe and do laundry along the banks of the Rio Grand after they crossed into the United States from Mexico, Saturday, Sept. 18, 2021, in Del Rio, Texas. The U.S. plans to speed up its efforts to expel Haitian migrants on flights to their Caribbean homeland, officials said Saturday as agents poured into a Texas border city where thousands of Haitians have gathered after suddenly crossing into the U.S. from Mexico. (AP Photo/Eric Gay)

Migrants wade across the Rio Grande from Del Rio, Texas to Ciudad Acuña, Mexico, to shop for food and supplies before returning back to the US side of the border, Sunday, Sept. 19, 2021. Thousands of Haitian migrants have been arriving to Del Rio, Texas, as authorities attempt to close the border to stop the flow of migrants. (AP Photo/Felix Marquez)

U.S. Customs and Border Protection mounted officers attempt to contain migrants as they cross the Rio Grande from Ciudad Acuña, Mexico, into Del Rio, Texas, Sunday, Sept. 19, 2021. Thousands of Haitian migrants have been arriving to Del Rio, Texas, as authorities attempt to close the border to stop the flow of migrants. (AP Photo/Felix Marquez)

U.S. Customs and Border Protection mounted officers attempt to contain migrants as they cross the Rio Grande from Ciudad Acuña, Mexico, into Del Rio, Texas, Sunday, Sept. 19, 2021. Thousands of Haitian migrants have been arriving to Del Rio, Texas, as authorities attempt to close the border to stop the flow of migrants. (AP Photo/Felix Marquez)

Two Haitian migrants, part of the group of people in Del Rio, Texas and Ciudad Acuña, Mexico to get access to the United States, bump fists after finding each other in the waters of the the Rio Grande while bathing early Friday, Sept. 17, 2021, in Ciudad Acuña, Mexico. Haitians crossed the Rio Grande freely and in a steady stream, going back and forth between the U.S. and Mexico through knee-deep water with some parents carrying small children on their shoulders. Unable to buy supplies in the U.S., they returned briefly to Mexico for food and cardboard to settle, temporarily at least, under or near the bridge in Del Rio, a city of 35,000 that has been severely strained by migrant flows in recent months. (Marie D. De Jesús/Houston Chronicle via AP)

A National Guardsman stands guard at a fence that runs along the Rio Grande near the International bridge, Friday, Sept. 17, 2021, in Del Rio, Texas. Thousands of Haitian migrants have assembled under and around the bridge in Del Rio presenting the Biden administration with a fresh and immediate challenge as it tries to manage large numbers of asylum-seekers who have been reaching U.S. soil. (AP Photo/Eric Gay)

Haitian migrants use a dam to cross to and from the United States from Mexico, Friday, Sept. 17, 2021, in Del Rio, Texas. Thousands of Haitian migrants have assembled under and around a bridge in Del Rio presenting the Biden administration with a fresh and immediate challenge as it tries to manage large numbers of asylum-seekers who have been reaching U.S. soil. (AP Photo/Eric Gay)

A dust storm moves across the area as Haitian migrants use a dam to cross into and from the United States from Mexico, Saturday, Sept. 18, 2021, in Del Rio, Texas. The U.S. plans to speed up its efforts to expel Haitian migrants on flights to their Caribbean homeland, officials said Saturday as agents poured into a Texas border city where thousands of Haitians have gathered after suddenly crossing into the U.S. from Mexico. (AP Photo/Eric Gay)

Haitian migrants use a dam to cross into and from the United States from Mexico, Saturday, Sept. 18, 2021, in Del Rio, Texas. The U.S. plans to speed up its efforts to expel Haitian migrants on flights to their Caribbean homeland, officials said Saturday as agents poured into a Texas border city where thousands of Haitians have gathered after suddenly crossing into the U.S. from Mexico. (AP Photo/Eric Gay)

Haitian migrants use a dam to cross into and from the United States from Mexico, Saturday, Sept. 18, 2021, in Del Rio, Texas. The U.S. plans to speed up its efforts to expel Haitian migrants on flights to their Caribbean homeland, officials said Saturday as agents poured into a Texas border city where thousands of Haitians have gathered after suddenly crossing into the U.S. from Mexico. (AP Photo/Eric Gay)

Haitian migrants use a dam to cross into the United States from Mexico, Saturday, Sept. 18, 2021, in Del Rio, Texas. U.S. officials said that within the next three days, they plan to ramp up expulsion flights for some of the thousands of Haitian migrants who have gathered in the Texas city from across the border in Mexico. (AP Photo/Eric Gay)

Haitian migrants carry provisions as they use a dam to cross into and from the United States from Mexico, Saturday, Sept. 18, 2021, in Del Rio, Texas. The U.S. plans to speed up its efforts to expel Haitian migrants on flights to their Caribbean homeland, officials said Saturday as agents poured into a Texas border city where thousands of Haitians have gathered after suddenly crossing into the U.S. from Mexico. (AP Photo/Eric Gay)

A bus moves Haitian migrants past a fence near the International Bridge where thousand have formed a makeshift camp, Sunday, Sept. 19, 2021, in Del Rio, Texas. (AP Photo/Eric Gay)

Haitians who were deported from the United States arrive at the Toussaint Louverture International Airport, in Port au Prince, Haiti, Sunday, Sep. 19, 2021. Thousands of Haitian migrants have been arriving to Del Rio, Texas, to ask for asylum in the U.S., as authorities begin to deported them to back to Haiti. (AP Photo/Rodrigo Abd)

Haitian migrants deported from the US gather after arriving to the Toussaint Louverture International Airport in Port-au-Prince, Haiti, Sunday, Sept. 19, 2021. Thousands of Haitian migrants have been arriving to Del Rio, Texas, to ask for asylum in the U.S., as authorities begin to deported them to back to Haiti. (AP Photo/Rodrigo Abd)

A migrant wades across the Rio Grande with a load of drinking water, from Ciudad Acuña, Mexico, to Del Rio, Texas, after shopping for supplies, Sunday, Sept. 19, 2021. Thousands of Haitian migrants have been arriving to Del Rio, Texas, as authorities attempt to close the border to stop the flow of migrants. (AP Photo/Felix Marquez)

Migrants wade back and forth across the Rio Grande from Ciudad Acuña, Mexico, into Del Rio, Texas, Sunday, Sept. 19, 2021. Thousands of Haitian migrants have been arriving to Del Rio, Texas, as authorities attempt to close the border to stop the flow of migrants. (AP Photo/Felix Marquez)

Migrants wade across the Rio Grande from Del Rio, Texas, to Ciudad Acuña, Mexico, to shop for food and supplies before returning back to the US side of the border, Sunday, Sept. 19, 2021. Thousands of Haitian migrants have been arriving to Del Rio, Texas, as authorities attempt to close the border to stop the flow of migrants. (AP Photo/Felix Marquez)

U.S. Customs and Border Protection officers stand guard on an illegal mass border crossing site on the Rio Grande from Ciudad Acuña, Mexico, into Del Rio, Texas, Sunday, Sept. 19, 2021. Thousands of Haitian migrants have been arriving to Del Rio, Texas, as authorities attempt to close the border to stop the flow of migrants. (AP Photo/Felix Marquez)

U.S. border patrol officers contain a group of migrants on the shore of the Rio Grande after they crossed from Ciudad Acuña, Mexico, into Del Rio, Texas, Sunday, Sept. 19, 2021. Thousands of Haitian migrants have been arriving to Del Rio, Texas, as authorities attempt to close the border to stop the flow of migrants. (AP Photo/Felix Marquez)

Haitian migrants walk to a bus after they were processed and released after spending time at a makeshift camp near the International Bridge, Sunday, Sept. 19, 2021, in Del Rio, Texas. President Joe Biden's administration is nearing a final plan to expel many of the thousands of Haitian migrants who have suddenly crossed into a Texas border city from Mexico and to fly them back to their Caribbean homeland. (AP Photo/Eric Gay)

Migrants from Haiti wait for a bus after they were processed and released after spending time at a makeshift camp near the International Bridge, Sunday, Sept. 19, 2021, in Del Rio, Texas. The U.S. flew Haitians camped in the Texas border town back to their homeland Sunday and tried blocking others from crossing the border from Mexico in a massive show of force that signaled the beginning of what could be one of America's swiftest, large-scale expulsions of migrants or refugees in decades. (AP Photo/Eric Gay)

Migrants, mostly from Haiti, wait for a bus after they were processed and released after spending time at a makeshift camp near the International Bridge, Sunday, Sept. 19, 2021, in Del Rio, Texas. President Joe Biden's administration is nearing a final plan to expel many of the thousands of Haitian migrants who have suddenly crossed into a Texas border city from Mexico and to fly them back to their Caribbean homeland. (AP Photo/Eric Gay)

Migrants, mostly from Haiti, board a bus after they were processed and released after spending time at a makeshift camp near the International Bridge, Sunday, Sept. 19, 2021, in Del Rio, Texas. The U.S. flew Haitians camped in the Texas border town back to their homeland Sunday and tried blocking others from crossing the border from Mexico in a massive show of force that signaled the beginning of what could be one of America's swiftest, large-scale expulsions of migrants or refugees in decades. (AP Photo/Eric Gay)

Migrants wade across the Rio Grande from Del Rio, Texas, to Ciudad Acuña, Mexico, Sunday, Sept. 19, 2021. The U.S. is flying Haitians camped in a Texas border town back to their homeland and blocking others from crossing the border from Mexico in a massive show of force that signals the beginning of what could be one of America's swiftest, large-scale expulsions of migrants or refugees in decades. (AP Photo/Felix Marquez)

Migrants wade across the Rio Grande from Del Rio, Texas, to Ciudad Acuña, Mexico, Sunday, Sept. 19, 2021. The U.S. is flying Haitians camped in a Texas border town back to their homeland and blocking others from crossing the border from Mexico in a massive show of force that signals the beginning of what could be one of America's swiftest, large-scale expulsions of migrants or refugees in decades. (AP Photo/Felix Marquez)

Migrants wade across the Rio Grande from Del Rio, Texas, to Ciudad Acuña, Mexico, Sunday, Sept. 19, 2021. The U.S. is flying Haitians camped in a Texas border town back to their homeland and blocking others from crossing the border from Mexico in a massive show of force that signals the beginning of what could be one of America's swiftest, large-scale expulsions of migrants or refugees in decades. (AP Photo/Felix Marquez)

Migrants wade across the Rio Grande from Del Rio, Texas, to Ciudad Acuña, Mexico, Sunday, Sept. 19, 2021. The U.S. is flying Haitians camped in a Texas border town back to their homeland and blocking others from crossing the border from Mexico in a massive show of force that signals the beginning of what could be one of America's swiftest, large-scale expulsions of migrants or refugees in decades. (AP Photo/Felix Marquez)

A migrant wades across the Rio Grande from Del Rio, Texas, to Ciudad Acuña, Mexico, Sunday, Sept. 19, 2021. The U.S. is flying Haitians camped in a Texas border town back to their homeland and blocking others from crossing the border from Mexico in a massive show of force that signals the beginning of what could be one of America's swiftest, large-scale expulsions of migrants or refugees in decades. (AP Photo/Felix Marquez)