Mass media credibility has been defined and studied largely as an attribute of message sources. This article argues that trust in media can be better understood as a relational variable-an audience response to media content. In addition, audience assessments of credibility are commonly explained as the result of each individual's skeptical disposition, either toward mass media in particular or as a general trait. The author dissents from this view as well, proposing that distrust is more likely to be a situational response, stemming from involvement with issues and groups. Using data from a national probability sample, the hypothesis was tested by analyzing the effect of numerous independent variables on respondent ratings of newspaper and television news coverage of social groups. As hypothesized, a respondent's own group identification proved to be the strongest predictor. The evidence was strengthened by replication across social groups, which provided built-in controls and demonstrated that an important part of the variance in trust of mass media news is within persons rather than between persons.