Sixteen automatic tests run over every campaign, PAC and race on this site and flag patterns worth a second look: where money hides, how it gets spent, and who it comes from. Each lead shows the evidence and links to the records.
Most of these patterns have ordinary explanations, and every lead lists them next to the reasons the pattern can matter. The point is to show where a curious citizen, a reporter or the FEC might look next. Spotted an error? See corrections.