Federal Labor minister Gary Gray is not sure whether he has done enough to retain his seat in Saturday's federal election.
Mr Gray faces a battle to retain the seat of Brand as the Liberal party threatens to virtually wipe out Labor's parliamentary presence in Western Australia.
His key rival, Liberal candidate Donna Gordin, has been boosted by endorsements from leader Tony Abbott during her election campaign.
Mr Gray - who is Kevin Rudd's resources and tourism minister despite having expressed reservations about his return to the prime ministership - holds the seat with just a 3.3 per cent margin.
Speaking at a mining conference in Perth on Tuesday, Mr Gray declined to say whether he was confident of retaining his seat of Brand.
"I am confident that I have done everything that I can do to try to win the confidence of the 100,000 who will vote in my seat," Mr Gray said.
"I'm hopeful that I will hold my seat but having said that, elections determine outcomes, not politicians talking about what they'd like the outcome to be.
"I'll wait to see what the people have to say about me in Brand on Saturday."