In Huntley v. Public Util. Com. (1968) 69 Cal.2d 67, the court in expanding on its earlier statements noted that a limited impairment of freedom of speech was constitutionally permissible when it applied only to: "(1) election campaigns (2) where the writing attacked a candidate (3) on a personal matter. Section 12047 reached irresponsible defamation of a candidate's personal life, an area not constitutionally protected , and fostered free and truthful elections, an environment necessary to the intelligent exercise of suffrage ." ( Id., 69 Cal.2d at p. 75.)