But it's also possible that Sunday's clash was borne of increasing desperation caused by the hardening of the policies, said Rachel Schmidtke, program associate for migration at the Woodrow Wilson International Centre for Scholars Mexico Institute.
People covered their faces to protect themselves from the acrid gas, as mothers clutched their young children and fled back to Mexico for safety.
The Mexican Foreign Ministry asked the USA authorities to conduct a thorough investigation of the events in which non-lethal weapons were used from the United States towards Mexico.
While medical professionals warned of the long-term health effects tear gas could have on children and Mexico's Human Rights Commission condemned the use of the chemical, Epshteyn kept up Trump's narrative in his segment.
The agency said the woman had fallen from the border wall about one mile east of the San Ysidro port of entry Saturday evening after she climbed over it to illegally enter the country.
When asked what would help in securing the border, Hastings said, in light of Sunday's events, that infrastructure would have been useful.
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It was not clear from the ministry's statement how numerous migrants were among those arrested on Sunday or when the deportations would take place. He said if resources were allocated for asylum seekers, it would slow down the process for people coming into and leaving the United States, including at worldwide airports.
US Customs and Border Protection Commissioner Kevin McAleenan said the administration's concerns about the caravan "were borne out and on fully display" Sunday. "If they were truly asylum seekers they would have just walked up with their hands up and surrendered".
"Rocking" or being "rocked" is how agents refer to the increasingly common tactic of migrants throwing large stones at the Border Patrol, hoping to wound or frighten agents.
"In a border context, when you are dealing with assaultive behavior, you're addressing it to resolve the situation", he said.
"[CBP] effectively managed an extremely unsafe situation involving over 1,000 individuals who sought to enter the United States unlawfully in large groups".
"Women and children who left their lives behind seeking peace and asylum were met with violence and fear". Sunday's incident began after hundreds marched to the border to try to call attention to their plight.
Media giant Sinclair Broadcast Group has reportedly released a new "must run" segment that balks at the caravan of migrants attempting to apply for asylum in the USA and applauds US officials for using force against them. Border Patrol agents countered using "less lethal devices", which included tear gas and "other projectiles", but not rubber bullets.
Trump also told the news outlet that the suggested $5 billion would pay for the physical barrier alone, and that additional funding would be needed for other border security measures. He says he's heard people talk of Rosarito, a beach town popular with U.S. tourists about a 40-minute drive south of Tijuana.
Four agents were hit with rocks, but due to their protective gear they were not seriously injured, McAleenan said.