Nationals preselection date set as fight over coal heats up With coal jobs set to dominate the Upper Hunter by-election, the major parties are scrambling to choose the right candidate to contest the marginal seat. Politics by Linda Silmalis Premium Content Subscriber only The battle for Upper Hunter has begun with the Nationals to preselect their candidate on Wednesday ahead of what will be a fast and furious campaign to retain the prized seat. Long-term Singleton Mayor Sue Moore is leading the field of prospective Nationals candidates, with party sources declaring up to three others locals are considering nominating for the seat.