The battle over that final rate hike of 2017 continues as some policymakers find it increasingly difficult to ignore weak inflation numbers in recent months. Such concerns, however, do not appear likely to take center stage in December. Indeed, the Fed looks fairly committed to a rate hike at that meeting. But the consensus on that meeting and beyond is being held together by forecasts of a rebound of inflation next year. It will be hard to maintain that consensus if inflation numbers don’t soon give more hope to those forecasts.