Labour leader Helen Clark has renewed her attack on National over the nuclear free legislation and foreign policy during a fiery visit to the University of Canterbury.
Clark cut short her appearance in front of students after a group of National supporters at the front of the crowd shouted and interjected throughout her speech.
After speaking for just five minutes she declined to take questions.
In her speech Clark told students that National wants the nuclear free legislation gone by lunchtime and its leader flip-flops every day on some issue.
She said she believes in New Zealand standing up for its own values and being nuclear free.
Clark told one interjector that his leader does not have the courage to front up to students.