Labor's campaign for the marginal seat of Hasluck is in disarray after its candidate Lauren Palmer quit the race, amid research indicating the party would poll worse than at the 2016 federal election.

It is understood Ms Palmer has cited the stress involved in running for a marginal seat in her decision to not contest the election, although Labor party officials are not responding to requests for comment.

Former Hasluck Labor candidate Lauren Palmer with Opposition Leader Bill Shorten and Shadow Transport and Infrastructure Minister Anthony Albanese.

The seat is held by Liberal Aged Care and Indigenous Health Minister Ken Wyatt by a margin of just 2 per cent.

A Labor source told WAtoday Ms Palmer's decision was made in the wake of polling in the seat conducted by the Australian Council of Trade Unions (ACTU) in March and April showing a swing away from the party.