The age of Jacindamania is over. Brand Ardern has taken its biggest knock yet - and when Labour's magic weapon loses its power, the party does too.

The latest Newshub-Reid Research Poll shows just how wounded Prime Minister Jacinda Ardern and Labour have been after the string of crises that have beset them.

Labour was the only party to lose support in Newshub's poll. It's now on 41.6 percent - smacked down by 9.2 percent.

Most of that went to National, which is on 43.9 percent - up 6.5. This is enough to overtake Labour, and that's manna from heaven for the Nats and leader Simon Bridges.