Democrats running as if Mitt Romney were president

The Democratic National Convention was full of angst about how “middle class” Americans are having such a hard time, how “the system is rigged against them” (as Elizabeth Warren put it), how the rich control everything, and other evocations of national misery.  But if things are so bad and electing Obama will solve the problems, why hasn’t he done anything about them so far?  As someone has noted, the Democrats are sounding like they are running against an incumbent President Romney.  But their guy is the one in office!  Their rhetoric is geared against the status quo–but they are the status quo!