The concurrence between Brexit (expected to revitalize a European defence on which London has always imposed strict limits) and the election of D. Trump in the United States (shedding light on the risks and uncertainties stemming from a situation of dependency) seems to have an almost seismic effect on the architecture of European and transatlantic security.

In the wake of the British referendum, U.S. Vice President Joe Biden noted, "We would have preferred a different outcome."[1] A few days later, Secretary of State Kerry said that it was still possible to "walk back" on Brexit.[2] Neither the disappointment nor the hope that the situation could still be reversed came as a surprise from the American side. Indeed, over the last six decades, Washington spared no effort to put, then keep, in the EU their favorite ally. The reason is simple. As explained by the U.S. Embassy in London, the European Union is "the world’s most important organization to which the United States does not belong". In order to make its voice heard, the U.S. needs their "man inside" or, in diplomatic terms, "the expression within the EU of common U.S.-UK attitudes through UK membership".[3] Except that British voters opted for the exit...

In 1975, at the time of the first British referendum on whether the United Kingdom should leave or remain in what was then the European Communities, a caricature of the Canard enchaîné depicted Prime Minister Harold Wilson in bed on a voluptuous, but visibly bored Europa who pleads: “In or out, my dear Wilson, but stop this ridiculous back and forth.”[1] It was more than forty years ago ... Four decades during which the UK has carefully kept their notoriously “semi-detached position” vis-a-vis Europe.