During the
2014 Victorian state election, Deeming stood as a candidate for the
Liberal Party for the seat of
St Albans in the lower house. She secured 26.9% of the vote, losing to the Labor Party's
Natalie Suleyman. At the 2018
state election Deeming stood as a candidate for the Liberal Party for the upper house
Western Metropolitan Region seat in the
Victorian Legislative Council. She received 356 first preference votes (0.08%) and failed to gain a seat. Deeming stood as a candidate for Watts Ward at the
2020 Melton local election on 24 October, receiving 21.49% of the primary vote and successfully securing the second allocation. Following the
2022 Australian federal election, it was reported in
The Age that on 26 March the Victorian Liberal Party's administrative committee voted for Deeming to run in the lower house seat of
Gorton. Before she was able to be endorsed, a top party official relayed the view of, then
Prime Minister of Australia,
Scott Morrison's
Office that "negative media coverage of Deeming's hard-line social views could distract" from Morrison's campaign. Her preselection was considered controversial because she replaced the similarly right-wing Bernie Finn at the top of the Liberal ticket, following Finn's expulsion from the Liberal Party after making "inflammatory social media posts".
Andrew Elsbury, a moderate Liberal Party member who held the seat from 2010 to 2014 quit the party in response to her preselection, describing it as the "final straw". Deeming was subsequently elected to the Legislative Council.
Anti-trans rally on 18 March 2023|alt=An image of neo-Nazi's performing Nazi salutes during the anti-trans protest on 18 March 2023 On 18 March 2023, Deeming spoke at an anti-trans rally in
Melbourne, which she co-organised with British anti-transgender rights activist
Kellie-Jay Keen-Minshull. The neo-Nazis repeatedly engaged in
Nazi salutes and carried far-right extremist banners (including one that
compared transgender people to paedophiles), which sparked clashes with counter protesters who attended the rally. Deeming later said that she had noticed the neo-Nazi group, but said she was told there was "nothing [they] could do" about their presence, and that she "just got back to [the] rally". She denied seeing the group perform salutes. She also said that she struggles to remember the anti-trans rally she helped organise. In a public statement Liberal opposition leader John Pesutto described Deeming's position as "untenable" due to her "involvement in organising, promoting and participating in a rally with speakers and other organisers who themselves have been publicly associated with far right-wing extremist groups including neo-Nazi activists". It was reported that Deeming was also supported by
Chris Crewther,
Matthew Guy,
Bill Tilley,
David Hodgett, and
Ann-Marie Hermans. Deeming subsequently accepted a nine-month suspension from the party as an alternative to expulsion. During Deeming's suspension, she threatened party leader Pesutto with legal action, but backed away after a fresh attempt was made to oust her from the party. This second effort was led by former party leader Matthew Guy. On 12 May 2023 she was expelled from the parliamentary
party room by 19 votes to 11. As a result of Deeming's expulsion, she then sat as an
Independent Liberal. In December 2023, after months of attempted mediation failed, Deeming filled a civil complaint against Pesutto. Deeming stated that she had been falsely accused of being an associate of "neo-Nazi sympathisers and extremists", which immediately followed the anti-trans rally and was recorded by
David Southwick, Pesutto's deputy. As a result of her win, Deeming stated that she expected to be able to return to the parliamentary party room. On 20 December 2024, the Liberal party room voted down a proposal to readmit Deeming to the party room. The vote was 14–15, with Pesutto's final vote defeating the motion. On 22 December, Pesutto called for a Liberal party room meeting scheduled on 15 January 2025 to discuss his motion to readmit Deeming, stating that an "absolute majority" now existed to do so. He apologised to Deeming for defaming her, but Deeming said that she learned about the apology from media. On 27 December there was
another motion to spill the leadership in the Victorian Liberal Party and readmit Deeming, the latter of which passed. On 16 May 2025, the Federal Court ordered Pesutto to pay $2.3 million in costs to Deeming, which he failed to do, and on 6 June 2025 Pesutto was served with a
bankruptcy notice. Deeming offered to delay the payment on the condition that her
preselection for the
2026 state election was guaranteed by the
Victorian Liberal Party. An additional offer was made by Deeming's supporter Hilton Grugeon, who offered to loan $1.5 million to Pesutto on the conditions that Deeming's preselection was guaranteed and that, if Pesutto challenged for the leadership of the Liberal party, the loan would immediately be withdrawn, potentially leading to Pesutto's bankruptcy and removal from parliament. Pesutto refused this deal. Deeming's offer was refused by the party which provided Pesutto with a loan of $1.55 million to cover his legal costs. Deeming expressed dismay at the loan which she described as "against the grain of everything we believe as Liberals". Deeming was referred to the
Independent Broad-based Anti-corruption Commission,
Victoria's anti-corruption
integrity agency.
Daniel Andrews is the first Premier to meet the requirements of the mandate, and will hence have a statue made of him. Deeming created a petition to stop the statue from being built, and compared the Andrews’ government to “authoritarian regimes”, that she said erect statues of living leaders as a “tool of political dominance, of intimidation, like with
Lenin or
Mao or
Hussein”, referring to Victoria's strict
lockdown laws. Both Deeming and Hermans attracted criticism, with Battin describing himself as "disappointed and very angry", yet refused to condemn either's comments. On 27 October 2025, Deeming was promoted to Shadow Assistant Minister for Local Government. In March 2026, Deeming lost preselection for her seat in the Victorian Legislative Council. As a result, she was not endorsed as a candidate by the Liberal Party of Australia for the upcoming state election. Shortly after that ballot the winning Liberal candidate, Dinesh Gourisetty, was revealed to have provided a character reference for a man convicted of grooming and sexually assaulting a child, and the Liberal party asked him to withdraw and determined to re-run the ballot. On the re-run, all of Deeming’s opponents withdrew from the ballot, ensuring Deeming was re-selected. == Political views ==