Singh's party failed to meet the 12-seat threshold to maintain official party status in the House of Commons, securing just a handful of wins nationwide.
Almost 2.5 million Australians have already cast early votes, but with millions still to vote on Saturday, both sides are ramping up efforts to secure last-minute support.
The 18-month investigation, known as Project Bay, uncovered an alleged cross-border trafficking operation that used commercial trucking routes to move massive quantities of cocaine, methamphetamine and opium between the United States and Canada.