Could Mr. Obama actually have offered such a plan? He might not have been able to get a big plan through Congress, or at least not without using extraordinary political tactics. Still, he could have chosen to be bold — to make Plan A the passage of a truly adequate economic plan, with Plan B being to place blame for the economy’s troubles on Republicans if they succeeded in blocking such a plan.

But he chose a seemingly safer course: a medium-size stimulus package that was clearly not up to the task. And that’s not 20/20 hindsight. In early 2009, many economists, yours truly included, were more or less frantically warning that the administration’s proposals were nowhere near bold enough.

Worse, there was no Plan B. By late 2009, it was already obvious that the worriers had been right, that the program was much too small.