To avoid this fate, America needed a much stronger program than what it actually got  a modest rise in federal spending that was barely enough to offset cutbacks at the state and local level. This isn’t 20-20 hindsight: the inadequacy of the stimulus was obvious from the beginning.

Could the administration have gotten a bigger stimulus through Congress? Even if it couldn’t, would it have been better off making the case for a bigger plan, rather than pretending that what it got was just right? We’ll never know.

What we do know is that the inadequacy of the stimulus has been a political catastrophe. Yes, things are better than they would have been without the American Recovery and Reinvestment Act: the unemployment rate would probably be close to 12 percent right now if the administration hadn’t passed its plan. But voters respond to facts, not counterfactuals, and the perception is that the administration’s policies have failed.

The tragedy here is that if voters do turn on Democrats, they will in effect be voting to make things even worse.

The resurgent Republicans have learned nothing from the economic crisis, except that doing everything they can to undermine Mr. Obama is a winning political strategy. Tax cuts and deregulation are still the alpha and omega of their economic vision.

And if they take one or both houses of Congress, complete policy paralysis  which will mean, among other things, a cutoff of desperately needed aid to the unemployed and a freeze on further help for state and local governments  is a given. The only question is whether we’ll have political chaos as well, with Republicans’ shutting down the government at some point over the next two years. And the odds are that we will.

Is there any hope for a better outcome? Maybe, just maybe, voters will have second thoughts about handing power back to the people who got us into this mess, and a weaker-than-expected Republican showing at the polls will give Mr. Obama a second chance to turn the economy around.

But right now it looks as if the too-cautious attempt to jump across that economic chasm has fallen short  and we’re about to hit rock bottom.