Starting as underdog in this campaign and with a former union official as leader, the Australian Labor Party (ALP) is the nation's oldest active political party.
It has contested state elections from 1891 and every federal election since Federation in 1901 and is proud of its long history fighting for workers.
The ALP is essentially the creation of trade unionists, and more than a hundred and twenty years after its formation, it's still influenced by the broader labour movement, with unions incorporated in its formal structures.
Underpinning the party is its system of factions, which are loosely-based around ideological beliefs on the left AND the right.
Electoral victory will be a tough task though, with Labor needing a uniform swing of four per cent and a net gain of nineteen seats to return to the seat of power.
If it does pull off an upset win, a federal Labor government will join current ALP administrations at a state level in Victoria, Queensland and South Australia.
