7. John Poindexter
As National Security Advisor under President Reagan, John Poindexter became a central figure in the Iran-Contra affair. His orchestration of covert arms deals and unauthorized funding of Nicaraguan rebels revealed the dangers of secretive defense policymaking. Poindexter’s conviction for his role was later overturned, but his involvement remains a cautionary tale about the limits of executive power and accountability. His legacy underscores how national security strategies can veer into ethical and legal gray zones (via NPR).
