Congress has been trying to crack down on data brokers — and the data brokers are fighting back. In late March, the House unanimously passed a bill that would prevent Americans’ data from being sold to foreign adversaries. And an amendment on data collection is mixed up in the bill reauthorizing Section 702 of the Foreign Intelligence Surveillance Act (FISA), the controversial statute that authorizes the National Security Agency, which expires later this month.Lawmakers’ negotiations over FISA’s...