Politics is vengeance before even getting elected i would have thought ?
Anyway he still a member of the liberal party he is still a member of the parliament he is still the elected member of his electorate he is not going anywhere till that time he doesn't get elected or chooses not to sit .
So until he decides otherwise he is going represent that view of a democratic system people will converse on as will he .
So until his electorate say otherwise the only way unseat him is to contest his electorate and win .
Di natale should run and get in the lower house so he has chance be prime minister perhaps .