"Yes, it was a former Walmart, but Walmart has nothing to do with it now", Kenneth Wolfe, a Department of Health and Human Services spokesman, said in an email.
The Texas Democrat appeared on CNN's State of the Union on Sunday morning and harshly criticized the Trump administration for tearing immigrant families apart and detaining children in separate facilities away from their parents. That is where the Trump administration has chose to place hundreds of children - some forcibly taken from their parents shortly after arriving at the border - in a "tent city".
Overall, the Trump administration is considering using the controversial method to house between 1,000 and 5,000 children at different military bases around Texas.
A Republican congressman from Texas who toured a tent-like shelter for hundreds of minors who entered the country illegally said on Saturday the facility is a byproduct of a flawed immigration strategy.
Kennedy and O'Rourke spoke to officials who were staffing the tent city facility in Tornillo, but were denied entry to inspect it.
The "zero tolerance" policy was introduced by Attorney General, Jeff Sessions and means all cases of illegal entry are referred for criminal prosecution.
The overflow of children at HHS facilities has caused backup at border stations, the first stop for immigrants crossing into the United States.
The children are each assigned a clinician to help them deal with separation trauma and mental-health issues.
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The family separation policy also came under criticism from the Southern Baptist Convention and the U.S. Conference of Catholic Bishops, according to The Hill.
Journalists have not been allowed access to the tent city. Center officials initially said they'd call the police on the visitors, but eventually allowed in the delegation.
"The younger they are, the more difficulty they'll have being detained and dealing with all that comes with detention", she said. In 2016, to accommodate a surge of unaccompanied minors, around 500 children were temporarily held at Fort Bliss' Dona Ana Range Complex, near Chaparral, New Mexico.
Meanwhile, the Trump administration's policy of separating families is coming under fire from both sides of the aisle on Capitol Hill.
"At the end of the day, in the land of the free and the home of the courageous, we should not be using children as deterrents when it comes to our broken immigration system", Representative Will Hurd, Republican of Texas, told the El Paso Times.
"My constituents that are outraged. they should know that I'm outraged too", Hurd said.
Contributing: Madlin Mekelburg and Daniel Boruda of the El Paso Times, Greg Jaklewicz of the Abilene Reporter News.