AbstractThe campaign finance system has fragmented campaign activity in response to rules that are unworkable in a strong party system. The 2014 congressional elections illustrate how party coalitions have adapted to practices that enable them to raise and spend money outside this formal regulatory framework. For several election cycles, partisan interest groups have used outside campaign organizations to circumvent rules that constrain candidate and party committees. The 2014 elections illustrate how party leaders in Congress and these candidates have now embraced the outside campaign strategy to wrest some control from other elements of the party. Recent changes to campaign finance rules may shift additional money toward traditional committees, but outside groups like Super PACs are now established features of US political campaigns.