Act Party Leader David Seymour has faith Chris Luxon can turnaround his preferred Prime Minister numbers.

The latest 1News Kantar Poll shows the National Party is in the popularity lead at 37 percent, compared to Labour on 34.

But the preferred Prime Minister rankings aren't as rosy for the Nats, with Luxon on 21 percent and Jacinda Ardern on 30 percent.

Seymour told Kate Hawkesby Luxon has a year to get better, whereas Ardern has probably peaked.

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