As there is an incessant crescendo, still gaining in volume each week, about President Obama’s “legacy,” I thought it appropriate to try to identify this legacy, which his supporters believe history will honor. I have written here and elsewhere that, apart from breaking the color barrier and disposing of bin Laden, I am hard pressed to think of anything useful in his legacy. Never have I been an Obama hater or someone who disputed his patriotism. I do think that Mr. Obama is rather subdued about the tired pieties of “American exceptionalism” and that this is not unjustified given his...