Embattled cabinet minister Bridget McKenzie could learn of her political fate as soon as Saturday, amid growing speculation she will be forced to quit the Morrison government's frontbench following the sports rorts affair.

A review into the conduct of the Nationals deputy leader during her time as sports minister is expected to be handed to Prime Minister Scott Morrison ahead of federal Parliament's return on Tuesday.

Prime Minister Scott Morrison is expected to receive a departmental review into Bridget McKenzie's conduct as sports minister. Credit:AAP

Senator McKenzie has continued to defend her conduct over the $100 million sports grants scheme amid Labor's demands she resign following a scathing Auditor-General report into her administration of the program.

The review found the former sports minister had ignored recommendations by government agency Sport Australia on which applications to approve before last year's election without apparent legal authority, favouring marginal and targeted seats.