Sussan Ley hasn't shown any clear strategy for the Liberals, former party leader John Hewson says. Photo: Mick Tsikas/AAP PHOTOS

A Liberal senator has cast doubt over Sussan Ley's leadership as party figures prepare to finally settle a position on net-zero emissions targets.

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After a fortnight of damaging infighting and supercharged leadership speculation, former frontbencher Sarah Henderson said she could not continue to "back things the way they are" ahead of a key partyroom meeting in the coming week.

"I do have to say really honestly, I do think Sussan is losing support," the se

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