Campaign priming is generally assumed to function through the activation of memory content. By focusing on specific issues or issue aspects, campaigns render corresponding cognitive concepts more accessible and hence influence which concepts are likely to be used in subsequent evaluation processes. Thus, priming is mainly understood as a cognitive process. In the present study we investigate the impact of campaign-induced emotions on opinion formation. We argue that emotions may activate cognitive content which may in turn influence political judgments. Our analyses support the hypothesis that political campaigns may influence public opinion not only through cognitive priming but also through affective priming.