Don’t laugh, this is almost always the most effective way for Republicans to reach “low-information” voters.

In the context of the 2012 campaign… [American exceptionalism] it has taken on a much more partisan edge, invoked by Republicans as a way to define President Obama as weak, lacking in core American values and almost unpatriotic.

It is easy to dismiss as election-season jingoism, the political equivalent of a “We’re No. 1” chant from the cheap seats. But the exceptionalism argument offers some voters a reassuring counternarrative to persistent joblessness, a long-term hollowing out of the middle class and a sense that the nation’s best days are past. And it intensifies the pressure on Mr. Obama to avoid sounding defensive about the difficult challenges he has faced as president and to articulate a positive story for why he deserves another four years.