Disagreement on key policy positions - including the Indigenous Voice to Parliament - was cited as the Member for Calare' sprimary reason for the decision.

"I was once a true believer but I'm not anymore. The National Party of today is very different to the one of my youth," Gee said in a media statement.

"I feel that I can best represent the constituents ... and our region by speaking out on issues, free from party constraints and expectations."

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