PREMIER Lara Giddings says Labor will target undecided voters after the latest poll showed almost one in four Tasmanians had not made up their mind one month out from the state election.
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The EMRS poll of 1000 voters showed little change in support for the three main parties since the last poll in November, with Labor's split from the Greens failing to boost its popularity.
Excluding undecided voters, the Liberals remain comfortably on track to win majority government on March 15, claiming 50 per cent support.
Labor's vote rose 1 per cent to 23 per cent, while support for the Greens dropped slightly to 17 per cent.
Ms Giddings said the large number of swinging voters was enough to propel Labor to victory.
"What we have to do now in this election campaign is talk to those undecided voters," Ms Giddings said.
"They are the critical people."
Greens leader Nick McKim said his party's popularity was rivalling Labor's based on figures including the undecideds, which puts his party just 2 per cent behind Labor.
When asked the first time who they intended to vote for, just 16 per cent nominated Labor and 14 per cent said the Greens.
"On this poll we are basically level pegging with Labor, with just four weeks to go," Mr McKim said.
Deputy Liberal leader Jeremy Rockliff said the poll showed only the Liberals could form majority government.
There was also very little change in the preferred premier stakes with 48 per cent naming Mr Hodgman as their choice, well ahead of Ms Giddings whose personal approval rating sits at 21 per cent.