National's next deputy leader has a daunting task ahead.

The party's caucus meets today to discuss who should fill Gerry Brownlee's now vacant position.

Brownlee lost his Ilam seat at the election after 24 years, also was also manager of the failed campaign.

Former National MP Jonathan Coleman told Kate Hawkesby picking a replacement will be complex.

"In the end, it will depend on whether the person can put aside the party's in-fighting and look to the future."

Coleman says the party is sitting at the bottom of the political cycle.

He says whoever is chosen may not end up as Deputy Prime Minister and MPs know this is a long game.

LISTEN ABOVE