| Climate Cabinet PAC
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| Climate Cabinet PAC (Federal)
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| Climate Emergency Advocates
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| Clint Moses for WI 29Th
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| Clousing for Assembly
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| Clovis Point LLC (Corporation)
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| Club for Growth Action
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| Club for Growth Wisconsin
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| CMS Energy (was Consumers Power Co) (Federal)
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| CNA Financial (Corporation)
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| Coalition for a Working WI
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| Coalition for American Values Committee
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| Coalition for American Values Committee PAC
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| Coalition for Community Solar Access (Corporation)
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| Coalition of Ignition Interlock Manufactures (Corporation)
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| Coastal Employee Action Fund
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| Coca-Cola Co PAC (Federal)
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| Coca-Cola Company (Corporation)
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| Coca-Cola Refreshments USA Inc Nonpartisan PAC
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| Coenen/Swandby (Lobbying Firm)
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