What Obama needed to deliver at this convention was not soaring rhetoric, but a plausible case for why Americans should grant him another term—and how, if they do so, the next four years would differ from the last four, write Joshua Green in Businessweek.
looking beyond borders 
What was delivered at the DNC? Top 3
http://yawper.org/2012/09/07/3-themes-of-the-democrat-convention/