One of the Labor Party's most powerful and influential figures, Tim Jacobson, has quit the party's election campaign committee.
Mr Jacobson, the secretary of the Health and Community Services Union, did not attend a meeting of the campaign committee in the South on Friday.
He resigned from the committee - made up of about a dozen people - just before Christmas.
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Mr Jacobson has declined to comment publicly on his resignation from the committee.
"It's an internal party matter and not for public discussion," Mr Jacobson said.
He has worked on election campaigns in the past and Labor sources say he walked out over "policy direction and strategy".
"I think Tim felt there was a lack of trust and that the party has not defined itself and put any policy meat on the bones," the source said.
"It has to be more than just talking jobs.
"If Labor thinks they can go from seven seats (in 2014) to 10 at the last election, to 12 next time they are mistaken."
It is believed Mr Jacobson's resignation is not a reflection of leader Rebecca White's ability or work ethic.
"It is hard for any Opposition leader anywhere in the country to get any traction at the moment so it's not really about Rebecca's leadership," the party source said.
Some are hopeful that Mr Jacobson will at some stage return to the committee.
The next state election is due before the end of March next year.