EDIT: (3.6 hours later) Chris Simpson is covering this story. He shows that the policies and organization at the heart of this are traced to Obama and Soros, and goes more deeply into the details of this and related news. https://www.youtube.com/watch?v=nho-eZNVemY

His summary of the video:

Streamed live 2 hours ago

Democratic U.S. Senator Jeff Merkley was mysteriously denied access to a detention center for immigrant children in Texas over the weekend. In a seperate interview, Merkely also said that he had seen "kids in cages at a separate facility in McAllen, Texas." While, the Senator attempted tying what he witnessed to policies of the current administration, the original pictures matching his descriptions were actually from the Obama presidency in 2014; the pictures had recently resurfaced, been misdated, and shared by liberal groups online. A possible diversion picked up by the Senator to cover for harmful immigration policies of Obama.

Regarding what happened on Sunday at the second facility, according a report from Williamette Week, "The detention center in Brownsville, Tex. is run by the nonprofit Southwest Key Program at a location called Casa Padre, which was a former Walmart turned detention center, according to Merkley."

La Raza, a George Soros funded immigration group, is among the SouthWest Key Program's affiliates.

Disturbingly, this news comes at the same time that investigators are looking into a newly uncovered possible child-trafficking bunker discovered in Tuscon Arizona, local police are claiming that they believe the site may be a homeless shelter, though this is being questioned by many online investigators who have found more evidence for trafficking than what authorities are acknowledging.

This is potentially relevant to the discovery by Senator Merkley, as the SouthWest Key Program has also operated in Tuscon before the recent scrutiny of their Texas, detention centre. "In Tucson alone there are 200 openings for jobs to assist with the sheltering of illegal immigrant children. This organization is taking old nursing homes and other buildings and converting them to house thousands of children."

What is really going on at these child detention facilities along the Mexican border?

EDIT 2: People are talking about who owns WalMart - better take a look at this:

Texans blame secret military takeover for Walmart closings, secret tunnels https://www.chron.com/news/houston-texas/article/Texans-blame-secret-military-drills-for-Walmart-cl-6214696.php

From r/conspiracy: U.S. Sen. Jeff Merkley Was Denied Access to Detention Center for Immigrant Children, and Somebody Called the Police When He Went to the Door

The news: http://www.wweek.com/news/courts/2018/06/03/u-s-sen-jeff-merkley-was-denied-access-to-detention-center-for-immigrant-children-and-somebody-called-the-police-when-he-went-to-the-door/

Here is the Facebook video of Markey being denied access to the facility https://www.facebook.com/jeffmerkley/videos/10155510407061546/

Here are some Redditor comments:

Blacked out windows after converting Walmart into a detention center. A detention center for underaged children who's parents are gone, missing or in another country. Children being watched by Random Non Profit people who's CEO gets over $700,000 Salary.

I mean If I wanted to organize a child-sex-ring THIS is the perfect setup. Unaccounted children, government persimmon to hold them. No fear of parents looking for them.

Remember PizzaGate? Seriously; this is 1000% more PizzaGate than PizzaGate ever was!

NO DOUBT those kids are being abused. Willing to bet everything I got.

So the conspiracy about turning Walmarts into detention centers is true? What about the the theory that there is a vast network of tunnels underneath Walmarts? Could this be connected to trafficking?

I thought you would be interested in this. God help these children. WTF is going on behind those blacked out windows?