Abstract: | The SVP is the strongest party in the National Council, but the weakest among governmental parties in the Council of States. This article analyses possible explanations for this surprising difference by combining macro‐level information on electoral results and data from recent election studies. The results presented show that the weakness of the SVP in the Council of States is due neither to its decision to compete only in selected constituencies, nor to “mechanical” effects of the electoral system. Rather, this weakness is explained both by the strategic behaviour of voters, who avoid “wasting” their vote in the majoritarian election of the Council of States, and by incumbency effects. The SVP is further disadvantaged by its ideological position, as its candidates have more difficulty gathering the majority of votes required for election in the Council of States than do, for instance, those of the centre‐right parties. |