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(From left) Labour candidate for Taranaki-King Country Angela Roberts, Te Pāti Māori candidate Hana-Rāwhiti Maipi-Clarke and Labour candidate for Northland Willow-Jean Prime. Photo: RNZ: supplied

Green Party co-leader James Shaw has compared the language of New Zealand First leader Winston Peters to former US president Donald Trump, saying it may be emboldening violence against candidates.