Labor leader Bill Shorten is still waiting for an independent report into bullying claims against one of his western Sydney MPs.
Emma Husar is facing an internal NSW Labor investigation into allegations she bullied and harassed about 20 former electorate office staff.
Mr Shorten, fresh off winning four by-elections on Saturday, was asked if he was preparing for another by-election in Ms Husar's seat of Lindsay.
"First of all, some of you may adore by-elections, I don't know," he joked with reporters on Sunday.
"But in all seriousness, going to the more serious matter, it's an independent investigation being conducted by NSW Labor.
"I'm going to respect that process and deal with whatever flows from it once that process is concluded."
Barrister John Whelan is investigating the claims, which include allegations that Ms Husar's staff worked as child minders and picked up her dog's faeces.
Last week Peter Gray, the field director for Ms Husar's unsuccessful 2015 bid for the state seat of Penrith, told the Sydney Morning Herald he was hospitalised for four weeks after bullying in her office.
"No matter what I did, it was never enough," Mr Gray told Fairfax Media.
A string of government MPs have called on Ms Husar, 38, to be sacked should the allegations by staff be proven.
But incoming Labor party president Wayne Swan rejects suggestions the Lindsay MP should resign, saying she was entitled to "natural justice".
"The truth is there is a process going on. It's been done in good faith, and Emma is entitled to natural justice," he told ABC radio on Friday.
Ms Husar is on personal leave while the investigation is continuing.
