New Zealand Prime Minister Jacinda Ardern has won a second term with a landslide victory in general elections on Saturday. The mandate means 40-year-old Ardern could form the first single-party government in decades. In her first term, her centre-left Labour Party shared power with a nationalist party. After the counting of over half of votes, Arden's party was on track to win 64 of the 120 seats in the country’s parliament, the highest by any party since New Zealand adopted a proportional voting system in 1996.