The Supreme Court will decide whether former Virginia governor Robert F. McDonnell was rightly convicted of corruption for his efforts on behalf of a businessman who bestowed money and gifts on the governor and his family. The court announced Friday that it would intervene in the long-running saga of McDonnell and his wife, Maureen, and the case provides the justices a fresh opportunity to define what kind of political conduct crosses the line into criminal behavior. The McDonnells, who were convicted in 2014, were accused of intervening with state officials on Williams’s behalf in exchange for $177,000 in loans, vacations and luxury goods. The former governor was sentenced to two years in prison; Maureen McDonnell received a year and a day.