So new budget projections show a cumulative deficit of $9 trillion over the next decade. According to many commentators, that’s a terrifying number, requiring drastic action — in particular, of course, canceling efforts to boost the economy and calling off health care reform.

Paul Krugman

The truth is more complicated and less frightening. Right now deficits are actually helping the economy. In fact, deficits here and in other major economies saved the world from a much deeper slump. The longer-term outlook is worrying, but it’s not catastrophic.

The only real reason for concern is political. The United States can deal with its debts if politicians of both parties are, in the end, willing to show at least a bit of maturity. Need...