Todd Muller and Nikki Kaye likely face a difficult challenge when it comes to the September election. 

The two have rolled Simon Bridges and Paula Bennett for the National Party leadership and deputy role respectively, after two polls showed National and Bridges' popularity had dropped. 

However, there are rumours that Muller won narrowly - with some sources claiming there was just one vote separating the leaders.

"It came down to a number of MPs very worried about their survival and about having a job in Parliament after the election."

The issue now for Muller and Kaye is trying to make their mark before going to the polls in September.

If they don't win, Bradford says the party could then be in the same position again at the end of the year.

"If National lose, can they hold onto those jobs, or will the party want to see someone else come in? And that's the risk Todd and Nikki have taken in doing this, is they know the task ahead of them now is massive."