Looking ahead to the fall, what's the scariest metric for Democrats to watch?

I'd say that it's the generic ballot question among those voters who express a high level of enthusiasm about the fall elections. And in the latest NBC News/Wall Street Journal poll, the gap between Republicans and Democrats in 13 points. 


The best number for Democrats these days: a not-insignificant rise in support for health care reform, engendered by the rallying of Democrats and Democratic-leaning independents to the cause.  If it passes, look for the number to rise even higher. 

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