This rectangular button is from Kweisi Mfume’s first run to represent a Baltimore, Maryland, congressional district in 1986. The design makes a subtle reference to the Baltimore city flag, a black-and-yellow diamond checkerboard pattern also found in the state's official flag.
History, Art & Archives, U.S. House of Representatives, “Kweisi Mfume Lapel Pin,” https://history.house.gov/Collection/Listing/2008/2008-048-001/ (September 19, 2021)
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