[3] Fiedler was born on July 18, 1980, in New York and as a young child moved to Bloomsburg, Pennsylvania.

Fiedler received a bachelor's degree in international relations at Bucknell University in 2002, and then worked at various restaurants in Philadelphia for six years.

[4] Fiedler's campaign platform focused on Medicare for All, increased public education funding, and environmental regulations on oil and gas companies.

She won the nomination with almost 51% of the vote in a 4-way race in the 2018 Democratic primary,[5][6][7] and did not face a Republican challenger in the general election.

[8] Fiedler has been endorsed by numerous labor unions including the Philadelphia Federation of Teachers, AFSCME, UNITE HERE, Teamsters BMWED, PASNAP, various environmentalist groups, the Pennsylvania Working Families Party, and the Democratic Socialists of America.