Compare campaign strategies in plurality systems versus proportional representation.

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In plurality systems with single-member districts, campaigns focus on swing voters in competitive districts because each district yields one seat and a win there depends on beating the nearest rival, not on overall national margins. That district-by-district dynamic makes swing voters pivotal and drives targeted messaging and mobilization in districts likely to flip. In proportional representation, seats are allocated roughly in proportion to votes across the whole electorate, so parties aim to appeal to a broad coalition to maximize their overall vote share and, by extension, seats. Coalition-building and wide-based platforms become strategic necessities under PR, since broad support across many voters translates into more seats. This contrast explains why targeting swing voters locally is characteristic of plurality systems, while seeking broad cross-cutting appeal is characteristic of PR. The other descriptions don’t align with the incentives created by how seats are actually allocated in the two systems.