Political parties regularly change their leadership following a disappointing election result, but how can parties be sure that a new leader will change how voters think about their policy positions? Drawing on a study of party leadership changes in seven European countries, Zeynep Somer-Topcu writes that leadership changes tend to increase the level of agreement among voters about what a party stands for, but that this effect is most pronounced when there is a clear change in policy following the new leader taking power.
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