Over the last six years Australia has had three prime ministers: Tony Abbott (the self-styled 'Prime Minister for Aboriginal Affairs' and champion of new paternalism), Malcolm Turnbull (who rejected the Uluru Statement) and Scott Morrison (who has been largely silent on Indigenous policy altogether). But during this time Indigenous Australia has had only one minister, Northern Territory senator Nigel Scullion. When he retires at the next federal election, Scullion's record in the portfolio will remain…