| Buffalo County Womens Republican Club
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| Buffalo Phils Grille LLC (Corporation)
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| BUILD - National Assn of Home Builders
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| Builders Direct Fund (Conduit)
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| Building a Better Government/Metro Builders Assn
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| Building a Better WI/Wisconsin Builders Association
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| Building a Stronger Wisconsin PAC
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| Building Advocates of Chiropractic PAC
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| Building America's Future
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| Building Bridges Campaign (Erin Tracy)
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| Building Grassroots Support PAC
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| Building Industry Council (Corporation)
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| Building Owners & Managers Association
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| Bullseye PAC
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| Burchill for Mayor (Local-Hudson, WI)
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| Burien Firefighters IAFF Local #1461 (Unregistered, Washington)
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| Burke for Wisconsin
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| Burley Firefighter Local 3308 (Unregistered, Idaho)
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| Burlington Northern Santa Fe Rail PAC (BNSF RAILPAC)
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| Burnett Co Democratic Party
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