Krugman and others have been saying this for a long time.  It's something of a hopeful sign to hear it coming from someone close to the Administration.

Why We Need a Second Stimulus

OUR national debate about fiscal policy has become skewed, with far too much focus on the deficit and far too little on unemployment. There is too much worry about the size of government, and too little appreciation for how stimulus spending has helped stabilize the economy and how more of the right kind of government spending could boost job creation and economic growth. By focusing on the wrong things, we are in serious danger of failing to do the right things to help the economy recover from its worst labor market crisis since the Great Depression.

The primary cause of the labor market crisis is a collapse in private demand — the same problem that bedeviled the economy in the 1930s. In the wake of the financial shocks at the end of 2008, spending by American households and businesses plummeted, and companies responded by curbing production and shedding workers. By late 2009, in response to unprecedented fiscal and monetary stimulus, household and business spending began to recover. But by the second quarter of this year, economic growth had slowed to 1.6 percent, according to a government estimate issued Friday. Clearly, the pace of recovery is far slower than what is needed to restore the millions of jobs that have been lost.

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But can the government afford this additional spending? The answer is yes. Despite the large federal deficit, global savers, including savings-hungry American households, are snapping up United States government securities at very low interest rates. And they will continue to do so as long as there is ample slack in the economy and inflation remains subdued. Over the next few years, there is little risk that federal deficits will crowd out private investment or precipitate a crisis of confidence in the American government, a spike in American interest rates or a sudden drop in the dollar.

On the other hand, as long as private demand remains weak, the risk is uncomfortably high that trying to reduce the deficit — by cutting spending or increasing taxes — will tip the economy back into recession or condemn it to years of faltering growth and debilitating unemployment. In fact, either outcome would depress tax revenue and could mean larger deficits.

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Now if we could just get the Republicans to either behave responsibly or get out of the way...  They don't seem inclined to do either of those things.