New Zealand's opposition leader abruptly has quit citing health reasons just weeks after taking the job, leaving his party in disarray with an election against incumbent Prime Minister Jacinda Ardern looming. In a brief early-morning statement, Todd Muller announced his immediate resignation as leader of the centre-right National Party, saying "I am not the best person" for the position. The 51-year-old ousted his predecessor Simon Bridges in late May but ...