A suggestion MPs are waiting until they're certain - before broaching potential resignations

Prime Minister Chris Luxon has said some National members may retire - and a reshuffle could be on the cards in coming months.

The Party's holding its caucus retreat in Christchurch today - where the election date will be announced.

Minister Mark Mitchell says many people play their cards close to their chest.

He says people will be going through a range of emotions and decision making, and talking with family before coming forward after making a decision.