Controversial election candidate Gerard Rennick donated more than $30,000 to the Liberal National Party in the year before he secured a winnable spot on its Senate ticket.

Key points: Mr Rennick gave about $35,000 to the LNP between June 2017 and July 2018

Mr Rennick gave about $35,000 to the LNP between June 2017 and July 2018 In July he was preselected in the third spot on the Coalition's Queensland Senate ticket

In July he was preselected in the third spot on the Coalition's Queensland Senate ticket Mr Rennick has donated just $1040 since that crucial LNP state council meeting

Mr Rennick has this week been caught sharing climate change conspiracy theories, and contentious ideas about preschool and tax.

He accused the weather bureau of tampering with temperature data in order to "perpetuate global warming hysteria".

The accountant was last July preselected in the third spot on the Coalition's Queensland Senate ticket, ahead of 28-year Upper House veteran Ian Macdonald.

He funnelled about $35,000 into party coffers between June 2017 and when party members cast their ballots in July 2018.

The 48-year-old had never previously donated to the party, according to Election Commission of Queensland data.

Mr Rennick has only donated $1,040 since that crucial LNP state council meeting last year, according to the commission.

Posts put boot into bureau

Mr Rennick has accused the Bureau of Meteorology (BOM) of "rewriting weather records to fit in with the global warming agenda".

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"Our public servants are out of control," he said on Facebook last month.

The taxation expert floated the idea of slashing Australia's company tax rate to 12 per cent — less than half its current rate — as part of a major overhaul to prevent multinational tax avoidance.

The self-described Russophile has also cast doubt over Russia's involvement in a deadly chemical attack in Britain.

The weather bureau strongly rejected his theories about rewriting temperatures.

Prime Minister Scott Morrison also distanced himself from Mr Rennick's claims that early childhood education was "not the best way to invest in our future".

Federal Labor has called for Mr Morrison to sack the candidate.

Federal election nominations closed yesterday and the party confirmed Mr Rennick would retain his position.

Donations not linked to rise, LNP says

Labor is calling for Mr Rennick to be dropped from his position on the LNP Senate ticket. ( Facebook: Gerard Rennick )

The vast bulk of Mr Rennick's donations were made in the lead up to the November 2017 Queensland election, which the LNP lost.

Mr Rennick donated more than $10,000 in the month of October 2017.

The Liberal-National Party rejected as "offensive and ridiculous" any suggestion the donations played a role in his preselection.

"The LNP's democratic process allows preselectors from all over the state to choose our Senate candidates," a spokesman said.

"We've been fortunate that many of our candidates have been very generous in helping to fund their own campaigns."

Mr Rennick did not contest the state election.

He secured eighth spot on the Coalition Upper House ticket for 2016's double dissolution poll when only five LNP senators made it to Canberra.

"And then all of a sudden he knocked off [current senators Ian] Macdonald and [Barry] O'Sullivan," said one LNP source, who was surprised by Mr Rennick's rise.

The Coalition usually wins at least three Senate spots in Queensland at regular elections.

But in 2019 he will face challengers including One Nation, Clive Palmer's United Australia Party, Katter's Australian Party and right-wing independent Fraser Anning.

Mr Rennick was contacted for comment but did not respond before deadline.