É a política, com certeza

Even before this economic crisis, Europe was weakened by a political crisis. Many Europeans have been preoccupied with revising European institutions, but repeated rejections of the Lisbon treaty demonstrate that a united Europe no longer captures the imagination of many of its residents. Lacklustre leadership of European organisations is both a cause and a result of this loss of momentum.
Behind this drift is the stark reality that Europeans have never quite committed to Europe, largely because of the continued pull of nationalism. If Europeans were serious about being a major power, they would trade the British and French United Nations Security Council seats for a European one. This is not about to happen.

Richard N. Haass