I am an associate professor of political science at Boston University. My research interests include American political institutions, separation of powers dynamics, and military policymaking. My first book (with Francis Shen) The Casualty Gap: The Causes and Consequences of American Military Policymaking (Oxford 2010) documents the emergence of socioeconomic inequalities in who bears the human costs of war and the ramifications of these inequalities for politics and policymaking. My second book After the Rubicon: Congress, Presidents, and the Politics of Waging War (Chicago 2010; winner of the 2013 D.B. Hardeman Award) investigates the informal mechanisms through which Congress substantially influences the initiation, conduct and duration of major American military actions, even when it fails to legislatively compel the president to alter his preferred policy course. My third book (with Andrew Reeves) The Particularistic President: Executive Branch Politics and Political Inequality (Cambridge 2015) explores how electoral incentives compel presidents to target federal resources disproportionately toward some parts of the country and away from others. Currently, I am completing a fourth book manuscript (with Eric Schickler), Investigating the President (Princeton, Under Contract), which examines Congress' ability to retain some check on the aggrandizement of presidential power through the investigatory arm of its committees.