The previous parliament was elected on 23 September 2017 and officially dissolved on 6 September 2020.[2] The opposing National Party, led by Judith Collins since July 22nd, was defeated in a landslide by the Labour Party led by incumbent Prime Minister Jacinda Ardern.[3] It was both the first time a New Zealand political party has secured a majority of seats under the MMP voting system, and the largest political win for one party in New Zealand history.[4]