In 2020, Fielder challenged State Senator
Scott Wiener for his seat in the
11th district. She advanced to the general election in a top-two primary system along with Wiener, but lost to him in the
general election. At the time, some in local politics compared her to
Alexandria Ocasio-Cortez. Former district 9 supervisor
Tom Ammiano administered Fielder's oath of office at her swearing-in ceremony in January 2025. Fielder chairs the Government Audit and Oversight Committee of the Board of Supervisors.
Immigration One of Fielder's first actions as Supervisor was introducing a resolution reaffirming San Francisco's status as a
sanctuary city, which received unanimous support from the Board. In June 2025, Fielder addressed a crowd of 9,000 people who were protesting raids by
U.S. Immigration and Customs Enforcement in San Francisco and condemned the arrest by local police of people attending the protest.
Housing and homelessness Fielder introduced legislation to end the city's policy that limits homeless shelter stays for families to 90 days and has repeatedly called on the mayor's administration to reconsider policies that could evict families from shelters without providing viable alternatives for affordable housing. Fielder endorsed a proposal to allocate $66 million a year to support families experiencing homelessness. In December 2025, Fielder voted against legislation to upzone 60% of San Francisco to allow for more housing.
San Francisco Parks Alliance Fielder has demanded accountability in the wake of the
San Francisco Parks Alliance financial scandal. She has called for a comprehensive audit of the Parks Alliance's relationship with the city's Recreation and Parks Department, specifically to scrutinize all financial and
in-kind relationships, including restricted funds and special arrangements. Fielder said that she would "do everything in my power so that the leaders of the Parks Alliance are held responsible". These subpoenas are intended to force these individuals to explain, under penalty of perjury, how millions in donor and city funds were misspent and why community groups' funds vanished. Fielder received criticism for her decision to amplify a post on the social media site X, promoting a crypto coin, $KitKat, named after the cat. == Personal life ==