A leaked Coalition review in which Peter Dutton criticised the work ethic of Andrew Hastie was a "factional hatchet job" to discredit the Liberal MP amid speculation he could soon challenge for the party leadership, Sky News host Peta Credlin has said.

The Sydney Morning Herald on Monday published secret submissions from the former Opposition leader to the party's election review in the wake of the May 3 landslide defeat, which accused Mr Hastie of going "on strike" ahead of the May 3 election.

The submissions appeared to argue that Mr Hastie, who held the shadow defence portfolio, did not complete an adequate review into Defence Department spending.

Sky News host Peta Credlin was sceptical of whether Mr Dutton had actually made that claim, but that even if he had, any policy deficienc

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