The casualties just keep on coming - today it was Labour MP and Cabinet minister Iain Lees Galloway, after admitting an affair with a former staffer.
The Prime Minister says he's opened himself up to accusations of improperly using his position, and has lacked the judgement expected of a minister.
The information was passed to Jacinda Ardern yesterday afternoon at Parliament by the National Party leader Judith Collins.
Just that morning Ms Collins had been dealing with a resignation of her own, just the latest in a string of scandals for National.
Here's RNZ political editor, Jane Patterson.