 Mizeur was first elected to public office in 2003, when she won a seat on the Takoma Park City Council.In 2006, Mizeur ran for a seat in the Maryland House of Delegates in District 20, which comprises Silver Spring, Takoma Park, Colesville, and White Oak in southeastern Montgomery County.In the Democratic primary, Mizeur garnered the most votes in a seven-candidate field for three seats, receiving 8,176 votes.