Even supposedly safe National strongholds such as Kerikeri were won by NZ First leader Winston Peters in Saturday's Northland byelection, booth-by-booth results show.
National had at least been expected to win in relatively well-off, politically conservative centres such as Wellsford, Mangawhai and Kerikeri, where candidate Mark Osborne and a roll call of government ministers had campaigned hard.
Election-night results from those three towns, however, show National managed to hold on to only Wellsford by a slim margin (201 votes to 194 for Mr Peters). The only other major booths won by National were in Paihia (175:158), Pukenui (by two votes, 127:125) and Hukerenui (96:87).
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Mr Peters won in Mangawhai (273:230) and Mangawhai Heads (137:120), and in Kerikeri's three main polling stations (Kerikeri Primary 381:297, Kingston House 355:302, Riverview School 257:222). Some of his biggest wins as a percentage of votes cast were in the South Hokianga towns of Omapere (122:34) and Rawene (126:20).