The NSW corruption watchdog will this week hand down its second set of findings about the granting of controversial mining licences by disgraced state Labor minister Ian Macdonald.
The release of the report from the Independent Commission Against Corruption (ICAC) on Friday just a week before the embattled Labor government goes to the polls on September 7.
Two senior federal MPs, NSW senator Doug Cameron and former federal Climate Change Minister Greg Combet, were called to give evidence during the inquiry, which probed a coal exploration licence granted by Mr Macdonald to a company run by ex-union boss John Maitland and other businessmen.
A separate ICAC report handed down in July has already recommended the DPP look at laying criminal charges against Mr Macdonald and former Labor minister Eddie Obeid, who were found by the ICAC to have acted corruptly in relation to a coal tenement at Mount Penny.
A string of former and current Labor members gave evidence during the hearings.
Former premiers Morris Iemma and Nathan Rees and former NSW treasurer Eric Roozendaal were also among the 150 witnesses called during the six months of hearings.
Federal ministers Stephen Conroy and Tony Burke were also mentioned as having enjoyed the hospitality of Mr Obeid at his Perisher Valley ski lodge.
The report comes as a recent Galaxy poll showed Labor will struggle to hold the western Sydney seats of Reid, Werriwa, Lindsay, Greenway and Banks.