I thought NZ National Party leader Simon Bridges came across pretty well in his address to the party’s annual conference yesterday, but he made one mistake so many leaders make without realising it. He did it twice during the day. What was it? He used negative language. At one point he said: “There’s a perception in politics that we on the right don’t care as much as the left do, but it’s not true.” While that may sound fine, people will...