Barack Obama has offered just one thing during his run for the Democratic presidential nomination: the hope for change in the nation's political leadership.
That's pretty much all he offers at this point, but it is no small thing. He is different in many ways and his idealism seems sincere. He does not carry the baggage of years and years going along to get along.
That makes his opponents' sudden adoption of his theme so patently cynical. "Wow," they say, "that change thing of Obama's worked pretty well in Iowa, so maybe I should be for change, too."
There are legitimate reasons to vote for other candidates. But their me-too assumption of Obama's theme simply shores up his claim that he alone offers fresh leadership and new thinking.