Although characterized by widespread public apathy and record low voter turnout, the 2009 Bundestag election solidified a stable, but fluid five-party system that will likely be a defining feature of German political life for the next generation. The three minor parties each achieved historical bests at the polls with steep losses for the two traditional Volksparteien. Drawing on data from the German Longitudinal Electoral Study (GLES), this article examines the nature of this new five-party system with a closer look at each party's voters in the 2009 election. The analysis shows the breadth and stability of the five-party system—each party draws significant support across all sixteen Länder; and, despite a growing number of swing voters, each party has a core group of committed voters that alone exceeds the 5 percent national electoral threshold. We also find evidence that the increased volatility and fluidity of the party system is structured along the left-right ideological spectrum with the parties divided into two major camps and vote-switching much more likely within the respective camps rather than between them.