ABSTRACT Do voters view cooperation between mainstream and radical parties differently when it occurs at the European as opposed to national level, and if so, why? Using an original survey experiment with over 8000 respondents from Germany and Italy, this paper explores how voters react to cooperation with radical political parties at the national and EU levels once they are made aware that such cooperation is occurring. Our results show that voters react negatively to cooperation with radical political parties. We find that when voters are aware of such cooperation, they express similar levels of disapproval regardless of whether it occurs domestically or in the EU. These results have implications for our understanding of domestic and EU political processes, and point to the role of information as a fundamental factor enabling accountability at the European level.
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