Bill Clinton’s speech at the Democratic National Convention was a remarkable combination of pretty serious wonkishness — has there ever been a convention speech with that much policy detail? — and memorable zingers. Perhaps the best of those zingers was his sarcastic summary of the Republican case for denying President Obama re-election: “We left him a total mess. He hasn’t cleaned it up fast enough. So fire him and put us back in.”

Great line. But is the mess really getting cleaned up?

The answer, I would argue, is yes. The next four years are likely to be much better than the last four years — unless misguided policies create another mess.

In saying this, I’m not making excuses for the past. Job growth has been much slower and unemployment much higher than it should have been, even given the mess Mr. Obama inherited. More on that later. But, first, let’s look at what has been accomplished.

On Inauguration Day 2009, the U.S. economy faced three main problems. First, and most pressing, there was a crisis in the financial system, with many of the crucial channels of credit frozen; we were, in effect, suffering the 21st-century version of the bank runs that brought on the Great Depression. Second, the economy was taking a major hit from the collapse of a gigantic housing bubble. Third, consumer spending was being held down by high levels of household debt, much of which had been run up during the Bush-era bubble.