‘I keep saying we should get a countdown clock, with the weeks and days left’, suggests Samantha Power, the Obama administration’s representative to the United Nations, in Greg Barker’s up-close HBO documentary The Final Year. The appropriately named Power, an Irish child immigrant and former law professor bewitched by the promise of Senator Obama, is talking about instilling urgency in the President’s foreign policy team, who have twelve months left in his second term to wrap up their agendas and make them watertight for whoever comes next. The ticking clock — 10 months left, now 4, now 1 — is meant to cast their…