Opposition parties have renewed their calls for John Key to sack Act leader John Banks, claiming a police finding showed he had misled the Prime Minister.

Act's board is standing by its leader, despite damning evidence in a police report into donations from Kim Dotcom and SkyCity in his 2010 mayoral campaign.

John Banks gave detectives investigating his political donations a three-hour interview, insisted it be kept private now blames police for withholding it.

Prime Minister John Key is standing by Cabinet colleague John Banks after revelations that Mr Banks' mayoralty campaign team drew up a list of rich donors to target.

John Banks' mayoral campaign team drew up a list of 10 rich donors to target for $25,000 each, new police documents show, and Kim Dotcom was asked for two payments.

The latest Herald DigiPoll survey shows the Conservative Party has had a poll bump from Parliament's passing of the first reading of the gay marriage bill.

Act must be clear about whether it would accept future donations from Louis Crimp, writes Paul Little.

Politicians have embarked on a new experiment to set up charter schools - all they need are guinea pigs.

The Act Party under John Banks' leadership is fast becoming Schadenfreude Central.