melbourne australia former deputy prime minister barnaby joyce return parliament essential by-election seat month kick dual citizenship crisis cost conservative coalition government majority joyce widely expect win say utterly humble sizeable victory rural new south wales seat new england look likely increase primary vote additional 10 point abc election analyst antony green report joyce track achieve primary vote 64 percent significant increase 52.3 percent primary last federal election 2016. win give government embattle prime minister malcolm turnbull much-needed breathe space restore slim one-seat majority government already claim victory vote confidence performance despite series poll show grow unpopularity stun victory turnbull tell supporters join joyce pub town tamworth celebrate win exit poll predict large swing government history by-elections australia turnbull say add sign confidence government joyce add completely utterly humble win record field 17 candidates say people new england never take anything grant every person vote us vote us first time say abc report joyce one citizenship seven whose eligibility sit parliament throw doubt find dual citizens status bar federal politicians australia constitution prevent split allegiances high court rule oct. 27 joyce along four seven lawmakers ineligible remain parliament force by-election joyce find dual citizen new zealand status since rescind by-election occur outside usual three-year election cycle usually representative decide leave parliament early die deputy leader position traditionally hold member junior coalition partner national party remain vacant since high court rule result come difficult time turnbull early week force embarrass reversal long-standing position royal commission country scandal-hit bank financial sector amid mount political pressure last day campaign by-election mar call new south wales nationals state leader deputy premier john barilaro turnbull step christmas gift nation comment quickly rebuff liberal party lawmakers joyce say unhelpful insult late long line internal turmoil hit coalition throughout year contribute poor performance poll throughout year australian former deputy prime minister return parliament