In 1983 Moore stood for the deputy leadership of the party. In a three-way contest, in which all candidates were from Christchurch to reflect geographical proportionality, Moore won the first ballot. Lyttelton MP Ann Hercus was eliminated and on the second ballot almost all of her supporters voted for Christchurch Central MP Geoffrey Palmer, who beat Moore by one vote. Leader David Lange later expressed relief at Palmer's success thinking that Moore would have been an un-reassuring deputy due to his inherent ambition. Nevertheless, Lange saw fit to promote Moore to number 3 in the party rankings and appointed him shadow minister of overseas trade and tourism.