So what can Obama do? It’s easy to say what would really help: rapid job growth, the revival of the housing market, transit systems that aren’t breaking down, the reinstitution of after-school programs, crowded shopping malls and auto showrooms–the kind of things that go with a robust economic recovery. But the U.S. economy isn’t going to morph overnight from its current woeful condition to a state of buoyant full employment. In a September 14 speech, Janet Yellen, president of the Federal Reserve Bank of San Francisco, warned of a “tepid” recovery that is “vulnerable to shocks” and an “unemployment rate [that] will remain elevated for a few more years.”

What Obama and the Democrats have to hope for, then, is not a full recovery, but sufficient improvement in jobs, wages, and public services to convince voters that the economy is on the mend. That’s what helped Roosevelt and Reagan keep their majorities–and, in Roosevelt’s case, what lay the basis for nearly four decades of Democratic hegemony. With the Republicans in disarray and demographic trends favoring the Democrats, an uptick in the economy for which voters credit Obama could lay the basis for a new Democratic majority. But, to accomplish this, Obama must promote programs that visibly and immediately provide economic relief.

In that respect, even a successful resolution to the current health care debate is unlikely to do Obama much good. Yes, it will ward off the stigma of incompetence and ineffective leadership that haunted Carter and Clinton during their first two years, but it isn’t likely to overcome the drag on Obama’s popularity of continuing joblessness.