| Shelia Stubbs for State Assembly
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| Sherman for Congress (Federal Candidate, California)
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| Shilling for Senate
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| Shrader For Wisconsin
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| Siamco (Sentry Insurance)
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| Sierra Club Political Committee
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| Sierra Club Political Committee (Federal)
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| SIGMA PAC (Independent Gas Marketers America)
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| Sillars for Assembly
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| Silveira for School Board (Local-Madison, WI)
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| Silver Lake Sportmans Club
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| Sinicki for Assembly
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| Sir Lines A Lot (Corporation)
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| Siss for Assembly
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| Sister District Project (Federal)
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| Skare for Senate
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| Skiing Wisconsin (Corporation)
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| Slaby for County Supervisor (Local-Price County, WI)
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| SLJ Government Affairs (Corporation)
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| SMART Political Action League - Sheet Metal Workers (Federal)
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