In the aftermath of Hurricane Katrina, there was widespread consensus that governmental response to the catastrophe was inadequate. From the chaos and lawlessness immediately following the storm to the slow pace of recovery efforts, political leaders and government officials were widely seen to have failed in dealing with the crisis. A key question thus presents itself: Who blames whom for the governmental failures, and why?In a series of articles (AJPS 2001, 2006; PRQ 2003; JOP 2006), we have elaborated a "theory of heterogeneous attribution," seeking to explain the cognitive processes underlying citizens' assignment of credit or blame for socio-political phenomena. The theory posits that causal attributions are fundamentally dependent on individuals' levels of political sophistication. Ceteris paribus, less sophisticated individuals will tend to assign credit or blame to fewer and more obvious actors than their more sophisticated counterparts. Clearly, other factors play a role-partisanship certainly shapes attributions, along with race, gender, personal circumstances, etc. Still, taking all of these influences into account, our theory predicts that political sophistication will play a key role in mediating the "blame game" associated with Katrina's aftermath.This paper will explore that proposition, drawing on a survey of Louisiana residents that we designed and that was recently completed by the Survey Research Center at LSU. The survey contains extensive batteries measuring both political knowledge and blame for the poor hurricane response, providing us with an excellent opportunity to explore the dynamics of political sophistication and causal attribution in the wake of this tragedy. ..PAT.-Unpublished Manuscript [ABSTRACT FROM AUTHOR]