Barack Obama launched into our national consciousness at the 2004 Democratic National Convention and ever since, he's delivered messages of patriotism, unity, and hope through the power of words. But of all the speeches he's given, six in particular may define his legacy as, in historian Doris Kearns Goodwin's words, "one of the best writers and orators in the presidency." Interviews with eminent historians and key figures in his writing process give rare insights into these iconic speeches, as well as the Obama presidency and the man himself.

• Documentary