Meanwhile, actual numbers show that the Affordable Care Act has sharply reduced the number of uninsured Americans — especially in blue states that have been willing to expand Medicaid — while costing substantially less than expected. The newly insured are, by and large, pleased with their coverage, and the law has clearly improved access to care.

Needless to say, right-wing think tanks are still cranking out “studies” purporting to show that health reform is a failure. But it’s a losing game, and judging from last week’s debate Republican politicians know it.

But what about side effects? Obamacare was supposed to be a job-killer — in fact, when Marco Rubio was asked how he would boost the economy, pretty much all he had to suggest was repealing health and financial reforms. But in the year and a half since Obamacare went fully into effect, the U.S. economy has added an average of 237,000 private-sector jobs per month. That’s pretty good. In fact, it’s better than anything we’ve seen since the 1990s.

Which brings us to the economy.

There was remarkably little economic discussion at the debate, although Jeb Bush is still boasting about his record in Florida — that is, his experience in presiding over a gigantic housing bubble, and providentially leaving office before the bubble burst. Why didn’t the other candidates say more? Probably because at this point the Obama economy doesn’t look too bad. Put it this way: if you compare unemployment rates over the course of the Obama administration with unemployment rates under Reagan, Mr. Obama ends up looking better – unemployment was higher when he took office, and it’s now lower than it was at this point under Reagan.

O.K., there are many reasons to qualify that assessment, notably the fact that measured unemployment is low in part because of a decline in the percentage of Americans in the labor force. Still, the Obama economy has utterly failed to deliver the disasters — hyperinflation! a plunging dollar! fiscal crisis! — that just about everyone on the right predicted. And this has evidently left the Republican presidential field with nothing much to say.