“…One reason that negative campaigning may be ineffective, despite its popularity, is because it can include the use of verbal aggression, messages which “[attack] the self-concept of another person instead of, or in addition to, the person’s position on a topic of communication” (Infante & Wigley, 1986, p. 61). Verbal aggression has been shown to inhibit persuasive effectiveness across a variety of contexts because it negatively impacts perceptions of message sources’ credibility, competence, and trustworthiness (Downs, Kaid, & Ragan, 1990; Edwards & Myers, 2007; Infante et al, 1992; Infante & Rancer, 1996; Jordan-Jackson, Lin, Rancer, & Infante, 2008).…”