A Liberal senator has blasted one of her colleagues for suggesting Sussan Ley's leadership could be under threat ahead of a series of crucial meetings where MPs will lock down their energy and climate change policy.

Conservative senator Sarah Henderson said on Friday the Liberals' political fortunes were flagging and Ms Ley was losing support.

Fellow Liberal Maria Kovacic said those comments were unnecessary.

"To actually suggest that a leader who is doing exactly what they said they would do ... to say that they've done something wrong, I think it's completely unhelpful and to be frank, probably somewhat undisciplined," she told ABC Radio on Monday.

"We should be focused on what Australians need from us, not what we think of a particular process that a leader has put into place," Sena

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