Mr. Stein’s campaign focused on education and abortion rights. But the core of his message was that Mr. Robinson, the Republican, was unfit to lead the state.

North Carolina Attorney General Josh Stein was elected governor on Tuesday, defeating Republican Lt. Gov. Mark Robinson and maintaining Democratic leadership of the chief executive’s office in a state where Republicans have recently controlled the legislature and appeals courts.

Democrat Josh Stein won the North Carolina governor's race on Tuesday, Edison Research projected, defeating Republican Mark Robinson, whose candidacy imploded following a CNN report that he had called himself a "Black Nazi" and made other offensive remarks on a pornographic website.