The FBI has begun examining the relationship between Virginia Gov. Bob McDonnell and his wife Maureen and the chief executive of a nutritional supplements manufacturer that is the subject of a federal investigation, two people with knowledge of the review said Monday. Federal authorities began questioning people close to the McDonnells as an outgrowth of a securities probe of Virginia-based Star Scientific Inc., said the two people, who spoke on the condition of anonymity because their roles in the case preclude them from speaking publicly.