National MP Steven Joyce has confirmed he is considering running for the leadership and expects to make a final decision in the next few days.
Joyce told the Herald he was talking to other National MPs and supporters about the leadership "and considering my position".
"My motive is to ensure the best team is in place to beat the Labour Government in 2020 rather than personal ambition.
"The biggest focus is to stop the Government implementing the kind of policies that will damage New Zealand."
Judith Collins and Simon Bridges have confirmed they will contest the leadership, which the caucus will vote on in a fortnight. Amy Adams is expected to join that list later today.