WASHINGTON — Pictures of Border Patrol brokers on horses, pushing again Haitian migrants crossing the Rio Grande to attempt to attain U.S. soil, have prompted outrage amongst Democrats and referred to as into query President Biden’s decision to swiftly deport thousands who had been arriving en masse at a small Texas border city.

Vice President Kamala Harris on Tuesday referred to as the therapy “horrible” and stated she deliberate to debate the problem with Alejandro N. Mayorkas, the secretary of the Homeland Safety Division, which has started an investigation.

“Human beings ought to by no means be handled that means,” Ms. Harris stated. “And I’m deeply troubled about it.”

Requested if Mr. Biden had seen the pictures, the White Home press secretary, Jen Psaki stated: “He believes that the footage and images are horrific. They don’t symbolize who we’re as a rustic. And he was happy to see the announcement of the investigation.”

The pictures and video footage of the brokers’ interactions with the migrants, which had been broadly circulated on-line, supplied a glimpse of the chaos that had been unfolding since final week, when massive groups of Haitians started crossing the Rio Grande and illegally getting into america in Del Rio, Texas. It’s the newest instance of the Biden administration, in its makes an attempt to claim management over hovering numbers of border crossings, belying the president’s pledge to revive an asylum program for susceptible households fleeing persecution and poverty.

The movies seem to point out mounted Border Patrol brokers corralling migrants and forcing them again to Mexico. A number of the brokers had been gripping and waving what seemed to be reins, prompting accusations that they’d been utilizing whips in opposition to them. One video captured an agent shouting an expletive at a migrant.

The Biden administration has flown greater than 1,000 individuals to Haiti since Sunday and plans to run seven flights a day beginning Wednesday, with room for 135 migrants on every aircraft, in accordance with an official aware of the plan who spoke on the situation of anonymity to debate inner methods. However some prime Democrats stated that technique was incorrect.

“I urge President Biden and Secretary Mayorkas to instantly put a cease to those expulsions,” Senator Chuck Schumer of New York, the bulk chief, stated on Tuesday. “We can’t proceed these hateful and xenophobic Trump insurance policies that disregard our refugee legal guidelines.”

The general public well being rule that the Trump administration put in place originally of the coronavirus pandemic has been used greater than 700,000 occasions beneath the Biden administration to shortly expel migrants, a lot of whom are searching for asylum.

Speaker Nancy Pelosi stated that Congress was carefully monitoring what she referred to as a “heartbreaking” state of affairs.

“All migrants searching for asylum should be handled in accordance with the regulation and with fundamental decency,” she stated in an announcement. “Any acts of aggression or violence can’t be tolerated and should be investigated.”

Leaders of civil rights organizations, together with the N.A.A.C.P., despatched a letter to Mr. Biden on Tuesday condemning the therapy of the Haitians.

“White (and white-presenting) males on horseback with lariats are seen chasing, yelling and cursing at susceptible Black asylum seekers who’ve for weeks and months been fleeing towards what they thought was security,” they wrote. “The actions of those Border Patrol officers are disgraceful and present an indifference to the humanity of Black migrants.”

The Border Patrol, based in 1924, when brokers had been recruited from the Texas Rangers and native sheriffs’ workplaces, is a sprawling arm of Customs and Border Safety. The company discovered itself within the highlight when President Donald J. Trump used harsh measures to limit the variety of immigrants getting into america.

It was additionally on the middle of a few of Mr. Trump’s extra restrictive immigration insurance policies, together with the “zero-tolerance” coverage that separated thousands of children from their mother and father, and the observe of quickly expelling migrants throughout the border in the course of the pandemic, which Mr. Biden has stored in place.

To make good on his marketing campaign promise of bettering the company’s accountability, Mr. Biden nominated Chris Magnus, the Tucson police chief, who is named a reformist, as his Customs and Border Safety commissioner.

However the Democratic-controlled Senate has but to schedule a date for his affirmation listening to, 9 months into Mr. Biden’s time period.

Throughout a information convention in Del Rio on Monday, Chief Raul L. Ortiz of the Border Patrol stated the mounted unit was deployed to help with safety and see if any migrants had been in misery, in addition to to assemble intelligence about smuggling organizations.

“Working in riverine setting, on horseback, is a tough state of affairs,” he stated, including that brokers used reins to attempt to management horses in order that they didn’t inadvertently injure migrants. He stated the actions of 1 agent on horseback, who seemed to be spinning his reins like a lasso as he loomed over a bunch within the water, had been most definitely associated to that problem.

“However we will definitely look into the matter,” Chief Ortiz added, “to ensure that we would not have any exercise that could possibly be construed as a response to a regulation enforcement effort that’s unacceptable.”

The Border Patrol’s mounted unit has beforehand been deployed to areas the place it may be laborious for brokers to see migrants making an attempt to evade them, such because the huge brush of carrizo cane alongside the Rio Grande, stated Gil Kerlikowske, a former commissioner of Customs and Border Safety. Brokers have stated that migrants can use the wooded areas to simply slip previous them.

However the brokers on horseback on Monday seemed to be alongside an open stretch of the Rio Grande, the place not households with youngsters had been additionally gathered.

“They’re actually good to look at in brush,” Mr. Kerlikowske stated, referring to the horses, “however out within the open, particularly with lots of people, might be not one of the best place for them to be.”

Of the Border Patrol, he added, “I feel they’re actually making an attempt to ship a powerful deterrence message.”

Regardless of initially suggesting that his administration would finish the general public well being rule and revert to permitting migrants to undergo the standard asylum course of, Mr. Biden has turned to deterrence measures, insisting that the border will not be open and utilizing repatriation flights to convey that now will not be the time for migrants to attempt to come to america. Border crossings in latest months have reached their highest level in decades.

Even so, there was inconsistency at numerous factors alongside the border about who will probably be prevented from getting into america beneath the general public well being rule. Some say that has led to confusion amongst migrants “about what the state of affairs is on the border and the way they will greatest search safety,” stated Robyn Barnard, the senior advocacy counsel for refugee safety at Human Rights First.

Immigration advocates have additionally urged that the administration is ignoring its personal evaluation of dwelling situations in Haiti, which it deemed so excessive that it extended authorization in late July for any Haitian who was within the nation to reside briefly in america.

“It’s reprehensible that Haitian households searching for security amidst political violence and a devastating earthquake at house are met with anti-Black violence and no actual alternative to hunt safety,” stated Katharina Obser, a director on the Girls’s Refugee Fee.

Lots of the migrants who lately arrived in Del Rio haven’t lived in Haiti for years; as a substitute they’ve been residing in South America after fleeing the catastrophic earthquake in Haiti in 2010. This has made the swift deportations even tougher for people who find themselves repatriated to a country they know little about anymore.

In actuality, not all of the migrants arriving on the border in Del Rio are being deported. Tons of of Haitian households have stated they worry returning house, and so they have been allowed into america to hunt asylum.

Throughout a Senate listening to on Monday, Republicans pressed Mr. Mayorkas in regards to the newest border disaster.

“It is a humanitarian disaster in Del Rio — you’ll be able to spin it whichever means that you really want. However you’re fairly proper, we must always not reduce the humanitarian situations for which, frankly, you’re accountable,” Senator Josh Hawley, Republican of Missouri, stated after Mr. Mayorkas described the situations he noticed in Del Rio a day earlier as a “human tragedy.”

“You and your administration are accountable,” Mr. Hawley added. “Tens of 1000’s of individuals dwelling in situations which can be startling, startling, introduced right here due to your insurance policies.”

His feedback got here after he grilled Mr. Mayorkas in regards to the Biden administration’s plan to deal with the rise in unlawful immigration.

In Del Rio on Tuesday, Gov. Greg Abbott of Texas additionally blamed the administration for the disaster.

“What the world is witnessing now could be the open-border insurance policies which can be being utilized by the Biden administration. It attracts individuals from throughout the whole globe,” Mr. Abbott stated. “It’s whole chaos, and the Biden administration, they should up their sport massive time.”

J. David Goodman contributed reporting from Austin, Texas, and Annie Karni from Washington.