The President’s Czars: Undermining Congress and the Constitution. Lawrence, KS: University Press of Kansas, 2012 (with Mitchel A. Sollenberger).
“Resolved: Presidential Czars Undermine Congress and the Constitution”, in Michael J. Nelson and Richard J. Ellis, eds., Debating the Presidency: Conflicting Perspectives on the American Executive. Washington, DC: Sage Press, 2014, pp. 228-233.
“The Origins and Development of Executive Branch Czars“, Journal of Policy History, Vol. 25, No. 2 (October 2013) (with Mitchel A. Sollenberger).
“Obama’s Executive Branch Czars: The Constitutional Controversy and a Legislative Solution”, Congress & the Presidency, Vol. 39, No. 1 (January-April 2012), (with Mitchel A. Sollenberger), pp. 74-99.
“Prerogative Power and Executive Branch Czars: President Obama’s Signing Statement”, Presidential Studies Quarterly, Vol. 41, No. 4 (December 2011), pp. 819-833.