In the last few months, the revolutions in the Middle East and North Africa seem to have transformed President Obama from a realist into an idealist. What is remarkable about this trajectory is how similar it is to that of his predecessor. When George W. Bush took office in 2001, he disdained Bill Clinton’s idealist “nation building” tendencies and in particular the idea of humanitarian intervention. But after September 11, Bush pursued his own hyper-idealist “freedom agenda”, the centrepiece of which was the Iraq war. When Obama took over in January 2009, he also repudiated the hubris of his predecessor and promised more humility in American foreign policy. During the first two years of his presidency, the United States seemed to have tilted towards realism. But just as Bush reinvented himself after 9/11, so Obama seems to have remade himself since the Arab Spring.