Labour leader Phil Goff's maintaining his attack on the Prime Minister's credibility, and the attacks are getting more personal.
He has again attacked John Key's record in office at a Greypower meeting in south Auckland.
He also responded to a Fairfax poll where respondents have said they would find Mr Key more likely to lie than Mr Goff.
"You can't go around promising things and then breaking your word," he said.
"He promised that GST would not be going up, he broke his word. He stood in the stadium and promised that New Zealanders would stop going to Australia, more then ever are going. He told the underclass in my electorate he'd do something to help, he's made life worse for them."