A high-profile investigation targeting perceived adversaries of the president has hit a major setback after its lead figure abruptly resigned, citing doubts about the case’s foundation. The probe, launched from a Florida U.S. attorney’s office, had already issued numerous subpoenas as part of its sweeping inquiry into alleged coordinated efforts against the administration. The resignation raises questions about the investigation’s direction and potential legal standing, leaving its future uncertain. Legal experts and observers will be watching closely to see how this development reshapes the broader political and judicial landscape.


Joe diGenova, a Trump ally tapped to lead a sprawling investigation into many of the president’s perceived enemies, resigned from his post late Thursday, indicating concerns over the strength of the case. The so-called grand conspiracy investigation was led out of a U.S. attorney office in Florida where prosecutors issued dozens of subpoenas in a...