A large literature has established a persistent association between the skills and resources citizens possess and their likelihood of participating in politics. However, the short-term motivational forces that cause citizens to employ those skills and expend resources in one election but not the next have only recently received attention. Findings in political psychology suggest specific emotions may play an important role in mobilization, but the question of ''which emotions play what role?'' remains an important area of debate. Drawing on cognitive appraisal theory and the Affective Intelligence model, we predict that anger, more than anxiety or enthusiasm, will mobilize. We find evidence for the distinctive influence of anger in a randomized experiment, a national survey of the 2008 electorate, and in pooled American National Election Studies from 1980 to 2004. no later than one year after the publication date. 2 The figure takes the average of ''proud'' and ''hopeful'' responses toward both candidates as a measure of general enthusiasm and compares it to the results for anger and anxiety. The NES item mentions fear, but we use fear and anxiety interchangeably, consistent with others (Brader 2006;Marcus et al. 2000).

Political behavior is triggered by the presence of a variety of material and cognitive resources, including political efficacy. The dominant view conceptualizes efficacy as capital, used to overcome obstacles to participation. Our theory suggests that unlike other resources, efficacy aids in the development of habitual participation by activating a particular negative emotion, anger. Using the 1990-1992 NES Panel, we find that internal efficacy boosts participation in part by facilitating anger, but not fear, in response to policy threats. This partial mediating effect operates primarily among younger citizens who are in the process of developing the habit of participation. External efficacy, because it is not self-referential, is not causally linked to participation via emotions. Finally, internal efficacy is enhanced by successful participation in politics, closing a feedback loop that helps explain participatory habits.