Here’s the situation: The U.S. economy has been crippled by a financial crisis. The president’s policies have limited the damage, but they were too cautious, and unemployment remains disastrously high. More action is clearly needed. Yet the public has soured on government activism, and seems poised to deal Democrats a severe defeat in the midterm elections.

The president in question is Franklin Delano Roosevelt; the year is 1938. Within a few years, of course, the Great Depression was over. But it’s both instructive and discouraging to look at the state of America circa 1938  instructive because the nature of the recovery that followed refutes the arguments dominating today’s public debate, discouraging because it’s hard to see anything like the miracle of the 1940s happening again.

Now, we weren’t supposed to find ourselves replaying the late 1930s. President Obama’s economists promised not to repeat the mistakes of 1937, when F.D.R. pulled back fiscal stimulus too soon. But by making his program too small and too short-lived, Mr. Obama did just that: the stimulus raised growth while it lasted, but it made only a small dent in unemployment  and now it’s fading out.

And just as some of us feared, the inadequacy of the administration’s initial economic plan has landed it  and the nation  in a political trap. More stimulus is desperately needed, but in the public’s eyes the failure of the initial program to deliver a convincing recovery has discredited government action to create jobs.