The inconvenient truth of the health debate is this: The vast majority of Americans are not only insured, they are satisfied with their insurance. They might grumble about premiums or deductibles or choice of doctors, but they are not about to embark on systemic change. Two-thirds of the some 150 million Americans who receive health coverage through their employer told the Gallup organization they were satisfied in 2016. About three-fourths of the plurality of Americans who receive coverage from Medicare, Medicaid, or the VA said the same. Why overthrow those arrangements cavalierly for Sanders’ revolution?

As President Obama would say: This isn’t my opinion. It’s the conclusion of liberals who would embrace a single-payer system if they had to recreate American health care from scratch. “A commitment to universal health coverage—bringing in the people currently falling through Obamacare’s cracks—should definitely be a litmus test,” writes Paul Krugman. “But single-payer, while it has many virtues, isn’t the only way to get there; it would be much harder politically than its advocates acknowledge; and there are more important priorities.”