Multi-state lawsuits, filed by U.S. state attorneys general (AGs), have become an important method by which state consumer protection laws are enforced. Patterns of participation in these lawsuits vary tremendously across the states, yet little is known about the factors driving this variation. I argue that state AGs are primarily concerned with achieving electoral and policymaking goals. Consequently, I expect AGs to be responsive to strong consumer interests and to participate in cases with severe infractions. Additionally, whether it is for public interest or electoral goals, AGs should be attracted to cases that promise bigger settlements. My analysis of each state's decision to join each of 172 multi-state lawsuits filed and settled between 1989 and 2002 provides support for each of these hypotheses.