Last night’s Democratic presidential debate shined an unlikely spotlight on a little-known section of the federal code — 8. U.S.C. 1325. This law makes crossing the border without legal authorization a federal misdemeanor. Its counterpart, 8 U.S.C. 1326, makes re-crossing the border a felony. They are the laws the Trump administration has leveraged to take thousands of children from their parents at the border.