We are in the midst of a presidential race lacking in passion. After four years, with the economy languishing, the optimism Obama appeared to represent last time is absent. Democrats will go to the polls without a spring in their step, to keep Romney out rather than save Obama’s neck. Even the president himself, if his hangdog look in the first debate is any guide, has lost his mojo. Obama has achieved what Romney could not: He has angered his own supporters for not fighting hard enough for the ideas they cherish.