What better accounts for Barack Obama's success with Congress, his political skills, or aspects of the political context, such as party control of Congress and public approval? To address this question, we update the Bond-Fleisher-Wood (BFW) political context model through 2010. The BFW model accounts for Obama's success vis-à-vis the House, and, to some extent, for the Senate as well. This article argues that increasing party polarization affects the relationship between party control and presidential success differently in the House and Senate. In the supermajoritiarian Senate, greater partisanship diminishes the effects of party control-in other words, as party polarization increases, presidential success declines for both majority and minority presidents. A comparison of Obama's success with that of previous presidents facing a similar context reveals no evidence that Obama has won significantly more often than should be expected given the context. Polity (2013) 45, 105-126.In his first two years in office, Barack Obama could boast of enactment of several landmark pieces of legislation, including economic stimulus, financial industry reform, health care reform, major tax legislation, and repeal of the "Don't AskDon't Tell" policy with regard to gays serving in the military. His success in sponsoring legislation also seems quite impressive. During his first years in office, his legislative proposals won 93 and 86 percent of House votes and 98 and 75 percent of Senate votes. The average success rates for other presidents, who like him, benefited from majority control were 77.5 in the House and 73.9 in the Senate. Given the gridlock, partisan bickering, and party polarization that