A federal judge has established guidelines for a legal challenge by a dozen states against the Justice Department's approval of Hewlett Packard Enterprise's $14 billion acquisition of Juniper Networks. The states allege the deal was politically influenced and are seeking information about the settlement that allowed the merger to proceed, despite objections from some DOJ officials. The judge ruled the states are entitled to some pretrial information sharing to assess competition risks, with a potential evidence hearing scheduled for March.