With Barack Obama, John McCain or Hillary Clinton becoming President of the United States, there is hope that the USA could adopt bold legislation to fight global warming in 2009. Albeit with differences, all three have backed serious legislative proposals and indicated their desire to engage actively in international negotiations. However, beyond campaign platforms and rhetoric, which of the three contenders offers the best climate change credentials for Europe? What support is the future President likely to receive to implement climate change legislation on par with Europe's ambitions?

Stephen Boucher's paper "Clinton, Obama, McCain - Europe's Best Hope for Fighting Climate Change"� provides a thorough assessment of the candidates' positions in the field and a thoughtful set of actions that Europe should pursue to reengage the United States. I would like to make 2 key points in response - firstly the nature of the challenge we face, then secondly the question of Europe's next steps.

I feel Stephen Boucher has taken on a difficult task because the future of the US policy on climate change is wide open. Even though all three candidates make their promises today, one cannot tell to what extent the eventual President will deliver. Nevertheless, it is worthwhile to have a closer look.

Stephen Boucher describes that the upcoming elections in the US provide a unique opportunity for Europe and the US to initiate the formulation of an effective global climate policy as well as the optimal design of instruments needed to reach urgent climate stabilisation goals.