Sen. Jeff Merkley (D-Ore.) went to a shuttered Walmart in Brownsville, Texas, that has been converted into a detention center for immigrant children who have been separated from their parents. He asked for a tour. Instead, the government contractor that runs the converted store called the cops. An officer filled out a police report, and the senator was asked to leave. The half-hour incident at a strip mall near the southern border with Mexico underscores the lack of transparency from President Trump's administration about its intensifying efforts to break up undocumented families caught crossing the border, the centerpiece of a "zero tolerance" policy announced by Attorney General Jeff Sessions last month. "The administration calls this 'zero tolerance.' ... It is really a 'zero humanity' policy," Merkley said. The senator said he tried to go through proper channels to arrange a site visit but was rebuffed. Merkley said he's also sought to figure out just how many kids are being held at the old Walmart ... but he still cannot get a straight answer. [This] policy may split up an untold number of families. Minors are not allowed in criminal jails, where adults are held when they're charged with crimes related to crossing the border. Children are sent to separate facilities. This happens even if their folks present themselves at official ports of entry and declare that they are seeking asylum.