Now It's Up To Obama

After two big nights in Charlotte, more rousing than anyone expected, the Democrats now have a major opportunity: if President Obama can make it three-for-three Thursday night, they could possibly break open the presidential race. Major caveats are in order. It is possible that the electorate is so severely polarized at the moment that even a smashing convention or a smashing first debate can't really move the needle. We will have to wait and see. It is also true, as John King emphasizes, that a bad unemployment number on Friday morning can persuade voters that the Obama team is actually incapable of reviving the economy.