[7] In 2016, Atwin co-organized a spin-off of We Day focused on introducing First Nations youth to one another and helping those who have recently moved off of reserves.

[11] She was the first Member of Parliament of the Green Party of Canada to be elected outside of British Columbia, the first third-party candidate to win the electoral district of Fredericton or its predecessor districts, which have traditionally alternated between Conservative and Liberal Members of Parliament (MPs), and the first woman to be elected in the riding of Fredericton.

[15] In May 2021, in response to the 2021 Israel–Palestine crisis, Atwin condemned Israeli airstrikes in the Gaza Strip and called Israel's control of the area apartheid.

[19] Atwin subsequently crossed the floor and joined the Liberal Party on June 10, citing lack of support from Paul's leadership after Zatzman's threat.

"[22] On June 14, 2021, shortly after joining the Liberal caucus, Atwin apologized for her earlier remarks, saying that she "regrets her choice of words" and adding: "Palestinians are suffering.

[27] During the 2024–2025 Canadian political crisis, Atwin was one of many Liberal MPs to request that Prime Minister Justin Trudeau resign.