For a speech before 80 000 people, Barack Obama might have been expected to summon winged chariots, F-14s and maybe a marching band. When he finished, hats would be cast into the air, and rent shirts would litter the floor. Obama may also have found himself a new slogan. “Change versus more of the same” is the phrase we hear all the time, but a better, more forceful pitch came early in the speech. After one of several passages in which he described the troubles of everyday people, he said: “Tonight I say to the American people, to Democrats and Republicans and independents across this great land — enough!”.