President Obama makes his first trip to Europe amid growing signs that European leaders may resist his calls for help on resolving the economic crisis, contributing to Afghanistan, and managing detainees from Guantanamo. Europeans quietly wonder about the depth of President Obama's commitment to Europe.

The upcoming NATO and G-20 summits, and the debates over Afghanistan and economic stimulus, will test the commitment of leaders from the developed and developing worlds to the kind of liberal internationalism necessary to rekindle the prosperity and peace in which our common values can flourish.