Pressure is mounting on Liberal leadership hopeful Angus Taylor to declare his hand and mount a challenge against Sussan Ley for the Liberal leadership.

The Shadow Defence Minister is expected to quit the Shadow frontbench, with other Liberals expected to follow, paving the way for a leadership spill. But some moderates are calling on Angus Taylor to launch a petition and prove he has the numbers first.

Melissa Clarke and David Speers break it all down on Politics Now.

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