Last summer the administration had separated more than 2,500 children from their families before worldwide outrage forced Trump to halt the practice and a judge ordered them reunited.
Mexico said it was cooperating with U.S. authorities concerning the migrants being sent back, but only for humanitarian reasons.
At the Brownsville bus terminal, the latest batch of migrants dropped off by border agents wait, many with no place to go.
On Monday, US federal Judge Richard Seeborg issued a preliminary injunction to block the Trump administration's "Remain in Mexico" migration policy.
Trump, who drew sharp criticism for falsely saying during the 2016 presidential campaign that Mexico was sending rapists and drug runners to the United States, said on Wednesday that those comments were tame compared to the stories he had heard since.
Democrats accuse Trump of "manufacturing a crisis" at the border by aggressively detaining migrants caught entering between official ports of entry and slowing the processing of asylum seekers, which can take months or longer.
Of last month's apprehensions, Hastings said about 30,000 were single adults, 8,900 were unaccompanied minors and 53,000 were people traveling with families - a 375% increase in families stopped at the border over the first half of fiscal 2018.
Obama did crack down on illegal immigration, resulting in large numbers of deportations and children were detained along with their parents.
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Separating parents from their children at the border previous year devolved into a humanitarian crisis and a public-relations nightmare.
"Those cages that were shown, I think they were very inappropriate", Trump said.
He said Trump's recent shakeup of the Department of Homeland Security has produced "nothing but more chaos".
Taken together, in the era of tribalism and identity politics, American public views on many aspects of the immigration issue follow the now-familiar partisan divide. "They have all these terrible laws that the Democrats won't change they will not change them".
The San Francisco ninth district judge's order against the migrant policy is not due to go into effect until 12 April, giving U.S. officials a chance to appeal the ruling.
Senior White House adviser Stephen Miller is said to be egging on the president to adopt an increasingly hardline stance on immigration.
The anonymous White House official went on to describe plans to revise "credible fear" screening for officials assessing asylum applications. Another would be to have U.S. Immigration and Customs Enforcement put more emphasis on tracking down illegal immigrants already ordered deported.
"The Department of Homeland Security is exercising its statutory authority to help alleviate this humanitarian and security crisis and secure our nation", Nielsen said.
Human Rights First, a NY based rights group, has described the administration's attempts to portray the screening process as a "loophole" as a "damaging rhetoric" that is "being used to legitimize changes to USA immigration laws that would block families, individuals, and children who have fled persecution".