Defeated opposition leader Peter Dutton has laid significant blame for the Coalition’s election loss at the feet of Liberal MP Andrew Hastie in explosive secret submissions to the party’s election review that accuse Hastie of going “on strike” and fumbling key policies.

Liberals across factions demanded colleagues stop leaking damaging details from the party’s internal review after this masthead revealed details of Dutton’s scathing assessment of Hastie’s performance, while National Party leader David Littleproud pleaded with his Coalition partner to stop internal warfare.

“We want the Liberal Party to do better,” Littleproud said. “The reality is if you’re focused on yourself, the Australian people won’t be focused on you.”

Hastie’s shock exit from leader Sussan Ley’s frontbench on Fri

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