This article investigates how the success of radical right parties affects the policy positions of mainstream parties. We do this using a regression discontinuity approach that allows us to causally attribute mainstream parties’ positional changes to radical right strength independent of...

Political parties respond strategically to the electoral success of radical right populist parties (RRPPs). While previous research has focused on programmatic responses on cultural conflict issues, we are expanding the research on policy position adaption to the economic left-right issue of...

Challenger parties’ electoral successes have attracted increasing scholarly attention. Based on the example of West European radical left parties, this article investigates whether and how centripetal and centrifugal positional movements on different conflict dimensions influence the election...