Separating families at the border takes harsh immigration enforcement practices to a new extreme

The Trump Administration's policy of separating and detaining the children of immigrant families who are crossing the US border to claim asylum has drawn condemnation both at home and internationally. Rachel E. Rosenbloom writes that the practice - at a time when attempted border crossings are at a historic low - is an alarming extension of long-established policies to criminalize and lock up those who attempt to enter the US.