A federal investigation into West Virginia Gov. Joe Manchin’s administration has taken a disturbing turn for his Democratic supporters: agents reportedly have subpoenaed the director of the state Aviation Division, along with flight logs and records for official government aircraft. The news comes just after federal prosecutors privately asked a judge to delay the sentencing of a contractor who got a no-bid contract to redecorate Manchin’s office. And the developments are set against an ongoing government probe reportedly involving state Democratic Party chairman Larry Puccio, Manchin’s former chief of staff. It’s highly unlikely the federal investigation will be resolved before...