The National Party leader Christopher Luxon is promising there will be no changes to abortion laws despite his personal views, if he becomes prime minister.
But National MP Simon O'Connor is staying quiet on the subject after being asked to remove a Facebook post in support of the US Supreme Court's decision to make abortion illegal.
He is one of 35 National MPs who voted against removing abortion from the Crimes Act.
Former colleague Amy Adams told Susie Ferguson abortion was a health issue for women and the Roe v Wade ruling was a horrifying reminder that no one can be complacent about hard-won freedoms.