The Federalist and Executive Power
Occasionally, the United States is confronted with the dilemma that, in emergencies, presidents may find it necessary to take actions that ignore constitutional restraints and break the law. In such cases, a strict adherence to the law might constrain the president from acting quickly to protect national security. Some have argued that the president has the constitutional authority to take whatever actions are deemed to be necessary, regardless of the law, and that this authority is available indefinitely as long as it is exercised under the commander in chief authority conferred in Article II. After reviewing the arguments in The Federalist, this paper argues that in crises presidents may legitimately take extraordinary actions outside their constitutional authority, but their actions are legitimate only insofar as they are transparent and presidents seek congressional sanction as soon as the immediate emergency has passed.
The American Presidency: An Intellectual History.
This is a provocative essay on the ambiguities and dilemmas of the American presidency. It offers observations on the issues and controversies surrounding high office, questioning what a president does and by what right he or she does it. This book was named one of the Year's Best Books on Politics by the "Chicago Sun-Times".
The Area of Freedom, Security and Justice ten years on: Successes and future challenges under the Stockholm Programme. CEPS Paperbacks. June 2010
This book celebrates the tenth anniversary of the Area of Freedom, Security and Justice (AFSJ) by bringing together the views of key practitioners and policy-makers who have played an outstanding role in thinking about and shaping EU policies on freedom, security and justice. 
 
Ten years ago, the member states transferred competences to the EU for law and policy-making in the fields of immigration, asylum and border controls, and began the transfer process for criminal justice and policing. This decade of European cooperation on AFSJ policies has experienced very dynamic convergence, the enactment of a large body of European law and the setting-up of numerous EU agencies working in these domains. Such dynamism in policy-making has not been without challenges and vulnerabilities, however. As this collective volume shows, the main dilemmas that lie ahead relate to an effective (while more plural) institutional framework under the Treaty of Lisbon, stronger judicial scrutiny through a greater role for national courts and the Court of Justice in Luxembourg, better mechanisms for evaluating and monitoring the implementation of EU AFSJ law and a more solid fundamental rights strategy. The contributions in this volume address the progress achieved so far in these policy areas, identify the challenges for future European cooperation in the AFSJ and put forward possible paths for making more progress in the next generation of the EU’s AFSJ.