Concerns are raised repeatedly about the uncivil and simplistic way in which politicians often express their ideas. This political communication style runs counter to deliberative democratic virtues such as respectful interactions and well-justified arguments. Its use is therefore problematic from a normative point of view, yet there are indications that it is an effective communication style to persuade citizens. Two survey experimentstext and audiowere developed to investigate the effects of uncivil communication and simplistic argumentation on political trust and on persuasive power in political election debates. The results show that 1) uncivil communication lowers political trust and is slightly less convincing than civil communication, 2) simplistic argumentation, i.e. political arguments presented in ill-or nonjustified ways, does not affect political trust and is not more persuasive than well-justified argumentation, and 3) the strongest violation of social norms, i.e. a combined use of uncivil communication and simplistic argumentation, decreases both trust in the political candidate and persuasive power. Interestingly, politically cynical citizens and citizens who do not value inclusionary debates react differently to uncivil communication and simplistic argumentation: their level of trust does not decline and they are persuaded slightly more by simplistic arguments expressed in uncivil ways.