WELLINGTON, New Zealand (Reuters) –  New Zealand Prime Minister, John Key, on Tuesday (April 5) threw his support behind his predecessor, Helen Clark, following her announcement she would campaign to be the next United Nation secretary-general. New Zealand submitted a letter on Monday to the president of the 193-member General Assembly formally nominating Clark, who heads the U.N. Development Program, as a candidate to succeed Ban Ki-moon as secretary-general. “There are major global challenges […]