Labor's Louise Pratt has conceded defeat in the West Australian Senate election re-run.
Despite Senator Pratt originally securing her seat on the back of a factional deal, she attacked the process that has now delivered victory to her running mate Joe Bullock.
She denied it was a case of "sour grapes".
Mr Bullock, the right-leaning shop assistants' union stalwart, was backed by the powerful United Voice which wanted to get left candidate Simone McGurk installed in the state seat of Fremantle.
This shunted Senator Pratt to second place on the party's WA Senate ticket.
United Voice last week withdrew its support for Mr Bullock after comments he about Senator Pratt at a Christian group function in November were revealed.
He had said Senator Pratt was a "poster child" for same-sex marriage, some Labor members were "mad" and that he saw himself as a bulwark against "every weird leftie trend".
