[16][17] Tana said she seeks to ensure that the government "gets real on climate action, regenerates our taiao (environment), and removes the shackles of a system that is designed to keep us poor, without means, or on a fast track to jail".

[18] In late November 2023, Tana assumed the Green Party's oceans and fisheries, science, innovation and technology, small business and manufacturing, media and communications, digitising government, internal affairs, and overseas New Zealanders spokesperson portfolios.

[19] During the Israel–Hamas war, Tana attended a Palestinian solidarity rally in November 2023 where she joined fellow Green MPs Chlöe Swarbrick, Ricardo Menéndez March and Steve Abel in chanting "From the river to the sea, Palestine will be free.

"[20] On 15 March 2024 Tana was suspended by the Green Party and stood down from her small business portfolio after allegations of migrant exploitation relating to two workers including an Argentine man who complained about unpaid wages while working at Bikes and Beyond.

By contrast Alex Kersjes and Nathan Santesso, lawyers for the former bike shop workers, stated that their clients felt "vindicated" and "exonerated" by the report.

[31] On 9 July, Kersjes said that one worker's income taxes had not been paid and urged Tana and her husband to pay the money that was owed to their former employees.

[32] New Zealand First leader and Deputy Prime Minister Winston Peters called for the Greens to use the waka-jumping legislation to expel Tana from Parliament.

Tana also criticised the independent investigation for allegedly choosing to interview people who "did not have direct relationship to the events and could only offer hearsay."

She attributed a delay in reporting the migrant exploitation allegations to the party to a busy Waitangi Day weekend where she was on "tea towel duty".

[34] On 17 July, the Green Party released the executive summary of Rachel Burt's independent report into Tana's migrant exploitation allegations.

The report found that Tana played a major role in running her husband's bicycle shop business and had been aware of the allegations prior to standing as a Green Party candidate.

[40] The trio also issued a joint letter claiming that Māori and Pasifika members of the party including Tana and former Green MP Elizabeth Kerekere had been mistreated and sidelined by the leadership.

[45] On 12 September, the hearing for a judicial review of Swarbrick, Davidson and the Greens' decision to expel Tana was held at the Auckland High Court.

Smith argued that Tana was attempting to abdicate responsibility for her resignation to avoid being expelled from Parliament under the waka jumping legislation.

[47][48][49] In late September 2024, Swarbrick announced that the Greens would hold a special meeting on 17 October to decide whether to expel Tana from Parliament using the waka-jumping legislation.

[52] On 22 October, House Speaker Gerry Brownlee revoked Tana's ability to attend Parliament and expelled her using the Electoral (Integrity) Amendment Act 2018.