Prime Minister John Key has dismissed any chance a private prosecution against him by persistent litigant Graham McCready will succeed.
The charges related to the case of former MP John Banks, who was found guilty of filing a false election return during his bid for the Auckland mayoralty in 2010.
Police initially did not file charges, but Mr McCready and later the Crown Law Office took up the case.
One of the fresh charges against John Key alleges he conspired to defeat the course of justice by ensuring Banks was not prosecuted by the police.
Speaking from New York, Mr Key called Mr McCready "a plonker" and said his case had as much chance of success as the All Whites had of winning the World Cup in Brazil, which, since they were not there, was none.
Mr McCready has also filed new charges against Mr Banks and an Auckland police officer, Mark Benefield.