Like the U.S. political system as a whole, the presidency has grown far more open to members of the public and, especially, to organised interests. Over roughly the same period, the presidency has become less permeable to much of the expertise and experience available within the executive branch. Together, these two features have contributed to weaknesses in the decision-making capacity of the institution, with implications for policy effectiveness and perceived legitimacy. This article sketches the bases for the claim of attenuated decision capacity and its implications. After arguing that changes in rules and structuring may help strengthen presidential decision-making capabilities, the article goes on to propose several such alterations.