Why did New Zealand's PM call a leadership vote on himself?

New Zealand PM Christopher Luxon says his leadership is secure after the National Party caucus backed him in an unexpected confidence vote on Monday. Luxon called for the vote after weeks of speculation about party room discontent. Amid tough economic conditions and in a volatile coalition, will Luxon survive through to New Zealand's next election in November? Guest: Henry Cooke, Deputy political editor, The Post, based in WellingtonProducer: Jack Schmidt