| Cal Fire Local 2881 (Unregistered, CA)
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| Calabrese For Assembly
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| Calderone Club (Corporation)
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| Caleb Frostman for State Senate
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| California Professional Firefighters (Unregistered)
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| Callahan for Wisconsin
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| Calpine Corporation PAC
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| Calumet Co Republican Party
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| Calumet County Citizens for Change
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| Calumet County Democratic Party
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| Camosy Construction (Corporation)
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| Campaign America
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| Campaign Committee of Dominique Stewart (Local-Menomonie Area School District)
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| Campaign Fund for Janquart (Local-Brown County)
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| Campaign Fund of Steve Cullen (Local-Milwaukee)
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| Campaign Fund of URW Local 19
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| Campaign Funds for Porter
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| Candidate Committee for Larry Mboga (Local-Eau Claire, Wi)
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| Candidate Committee of Brian Schanen (Local-Whitewater, WI)
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| Candidate Committee of Rachel Henderson (Local-Menomonie Area School District)
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