Maverick Liberal senator Cory Bernardi has called on the government to support similar positions to One Nation in order to reconnect with voters concerned about Muslim immigration and declining industries.

Speaking to Sky News from New York, where he is on a three-month secondment to the United Nations, Senator Bernardi said a poll showing Labor leading the Coalition 52-48 had highlighted the popularity of third parties.

"What I noticed today was the drop in the Liberal poll, there was about a commensurate lift in the 'others' poll. So it hadn't gone to Labor, it has gone to others," he told host Andrew Bolt on Tuesday night.

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