Dennis Burke, one of Arizona’s most prominent and well-connected Democratic political figures, abruptly resigned as the state’s top federal prosecutor Tuesday, stirring doubts about earlier expectations that he might mount a bid for governor, attorney general or U.S. senator.
Burke served in Washington as a senior adviser to Homeland Security Secretary Janet Napolitano and in Arizona as her chief of staff when she was governor. His departure as U.S. Attorney comes as congressional investigators and an internal Justice Department inquiry are examining how an Arizona-based federal gun-trafficking investigation may have allowed as many as 2,000 guns to flow to criminals.