If the opinion polls, betting markets and political commentators are correct, Ms Gallagher's government will be the only thing standing between a Coalition clean sweep of states and territory governments on Sunday.

Prime Minister Tony Abbott told ABC Radio in Melbourne on Friday that, with the next election not due until October 2016, there was ''no likelihood of the ACT becoming a Liberal-held territory any time soon.''

Ms Gallagher said she would await the outcome of the two state elections. ''I will check the landscape out on Sunday morning but, even if it does eventuate that I am the last Labor leader, I don't actually think it will change things enormously for us or for our relations with the federal government.''

Ms Gallagher said she had maintained ''cordial'' relations during the first six months of the Abbott government and acknowledged the relationship between the ALP and the Greens in Tasmania would influence some voters.

Before calling the election, Premier Lara Giddings sacked Greens ministers Nick McKim and Cassy O'Connor after four years of government with the party's backing.

ACT Greens MLA Shane Rattenbury holds the balance-of-power in the ACT and has served as Territory and Municipal Services Minister since the 2012 election.

A spokesperson for Mr Rattenbury said he contributed to a Tasmanian Greens campaign planning day last year.

ACT Legislative Assembly Speaker and Canberra Liberal Vicki Dunne was this week campaigning for the party in Tasmania, where Opposition Leader Will Hodgman is tipped to take power.

''I think we have to understand that the politics around the environment in Tasmania is quite different from what they are here,'' Ms Gallagher said.

''We don't have the forestry industry that has divided Tasmanians. People who vote Green here are traditionally left-leaning voters so they are more on our side of the political fence anyway whereas in Tasmania … they are genuinely worried about their economic future and that is a different tension.''

She said the 2012 election proved Labor could be vulnerable in the ACT.

''People who say Canberra is just a Labor town and it's never going to change, [should] just look at the last election.

''They sent us a strong message. They weren't prepared to boot us out but they did want us to listen to what they were saying.''

Ms Gallagher said the Council of Australian Governments worked in a collegiate manner.

''I was at the COAG table when it was all Labor governments and over the past three years I have watched that change but the discussions haven't changed enormously.''

In South Australia, Labor Premier Jay Weatherill will seek to replicate his party's unexpected 2010 election win by holding marginal seats.

He warned that if elected, South Australian Liberal leader Steven Marshall would be just another voice in ''wall-to-wall Liberal governments''.