Yet there is a sense in which the election is indeed a referendum, but of a different kind. Voters are, in effect, being asked to deliver a verdict on the legacy of the New Deal and the Great Society, on Social Security, Medicare and, yes, Obamacare, which represents an extension of that legacy. Will they vote for politicians who want to replace Medicare with Vouchercare, who denounce Social Security as “collectivist” (as Paul Ryan once did), who dismiss those who turn to social insurance programs as people unwilling to take responsibility for their lives?

If the polls are any indication, the result of that referendum will be a clear reassertion of support for the safety net, and a clear rejection of politicians who want to return us to the Gilded Age. But here’s the question: Will that election result be honored?

I ask that question because we already know what Mr. Obama will face if re-elected: a clamor from Beltway insiders demanding that he immediately return to his failed political strategy of 2011, in which he made a Grand Bargain over the budget deficit his overriding priority. Now is the time, he’ll be told, to fix America’s entitlement problem once and for all. There will be calls — as there were at the time of the Democratic National Convention — for him to officially endorse Simpson-Bowles, the budget proposal issued by the co-chairmen of his deficit commission (although never accepted by the commission as a whole).

And Mr. Obama should just say no, for three reasons.