| Coggs-Phillips (Local-Milwaukee)
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| Coin Clean
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| Coinbase (Corporation)
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| Cole for Congress (Federal Candidate - Oklahoma)
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| Collaboration for Good (Unregistered)
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| Collections Services, Inc (Corporation)
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| Collective Impact PAC (Federal)
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| College of American Pathologists (PATH-PAC)
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| College Possible National (Corporation)
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| College Republicans UWSP
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| Collins State Bank (Corporation)
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| Colon for Assembly
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| Colorado Professional Fire Fighters Small Donor Fund (Unregistered)
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| Columbia Co Republican Party
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| Comm for Progressive Representation
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| Comm to Elect Dale Dulberger
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| Comm to Elect Green
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| Comm to Elect Hamilton
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| Comm to Elect Robert Fyrst (Local-Madison, WI)
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| Commercial Assn Realtors PAC
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