Each dot is a major political committee; a line joins two that draw from the same donors. Thicker, shorter links = higher overlap (Jaccard), which controls for size so a giant committee doesn't look allied with everyone. The layout pulls shared-donor allies together — clusters are de-facto money factions. Hover a node, click to isolate its neighborhood, click a link to see the donors two committees actually share, or flip the legend to Faction to color by discovered bloc instead of party.