Senators Ken Anderson ( Liberal ) , Tom Bull ( Country ) , Sir Alister McMullin ( Liberal ) , Tony Mulvihill ( Labor ) and James Ormonde ( Labor ) were not up for re-election .
The Liberal - Country Coalition was defending two seats .
Senators Ken Anderson ( Liberal - Country Coalition ) , Tom Bull ( Country ) , Sir Alister McMullin ( Liberal - Country Coalition ) , Tony Mulvihill ( Labor ) and James Ormonde ( Labor ) were not up for re-election .
The Liberal - Country Coalition was defending two seats .