Jacinda Ardern has choked back tears as she announced her resignation as New Zealand Prime Minister in an emotional press conference. Her resignation comes into effect on Sunday if the Labour Party can elect her replacement, or on February 7 if the process was drawn out. Ms Ardern said she hoped to find the energy and heart during the Christmas break to stay in the job, 'but I have not been able to do that'. 'I am human. Politicians are human. We give all we can for as long as we can - and then it's time. And for me,...