Resource dependence theorists argue that boards of directors with political capital can benefit focal firms by reducing uncertainty and providing preferential resources. Here, we develop theory regarding the downside of board political capital. As the principal-principal agency problem characterizes many parts of the world, we argue that board political capital can exacerbate this problem by enabling large blockholders to undertake more appropriation of firm wealth. Further, we explore how this enabling effect is moderated by ownership-, industry-, and environment-level contingencies. We find empirical support for our arguments using 32,174 directors in 1,046 Chinese listed firms over the period 2008 - 2011. Our study sheds light on new ways in which resource dependence and agency theories can be integrated to advance the extant research on board governance and corporate political strategy.