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In page Gary Doer:

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Doer first joined the New Democratic Party in the 1970s, and worked for the party in the 1973 provincial election.[8] He discontinued his membership in 1975 to preserve the neutrality of his union, and was later courted by both the New Democrats and Progressive Conservatives to run for public office.[9] He rejoined the NDP in 1986, and was a candidate in that year's provincial election.[10][11]