Mr. Obama hardly created this moment, with its potent brew of Bush loathing and sweeping generational change. He simply had the vision to tap into it. Running in 2008 rather than waiting four more years was the single smartest political decision he’s made (and, yes, he’s made dumb ones too). The second smartest was to understand and emphasize that subterranean, nearly universal anticipation of change rather than settle for the narrower band of partisan, dyspeptic Bush-bashing. We don’t know yet if he’s the man who can make the moment — and won’t know unless he gets to the White House — but there’s no question that the moment has helped make the man.