It started with a series of posts on social media.

Nostalgic images of Australia from decades ago, accompanied by statements like  "we're starting to feel like strangers in our own home” 

WA Liberal MP Andrew Hastie’s public posts about what he’s calling “out of control” immigration, as well as housing and energy costs have now led to his resignation. 
 
While that means he’s on the backbench right now, the conservative MP has made no secret about his ambition to lead.

Today, political reporter Karen Middleton, on Andrew Hastie’s rebellion – and what it means for Sussan Ley’s future.

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Guest: Political reporter Karen Middleton

Photo: AAP Image/Lukas Coch