‘I know what this job takes, and I know that I no longer have enough in the tank to do it justice.’ FILE - New Zealand Labour Party leader Jacinda Ardern, center right in front, poses for a selfie with students of Addington School in Christchurch, New Zealand, on Aug. 16, 2017. Ardern became an inspiration to women around the world after winning the top job in 2017 at the relatively young age of 37. (AP Photo/Mark Baker, File) New Zealand Prime Minister Jacinda Ardern, who became a global icon of the left and exemplified a new style of leadership,...