The Bush administration tried to “ram” through an insufficient environmental report and must temporarily cease work on a 1.5-mile-long section of fence on the Arizona-Mexico border, a federal judge ruled yesterday. Judge Ellen Segal Huvelle agreed with the Defenders of Wildlife and the Sierra Club that federal agencies’ three-week-long environmental assessment seemed unnecessarily hurried, but noted that her ruling may not do much; Homeland Security Secretary Michael Chertoff has the power to waive all environmental laws to build the fence.