The old becomes the new. Less than a week out from the Iowa caucuses, Bernie Sanders, born two months before Pearl Harbor in September 1941, leads the RealClearPolitics average of recent polls by 4 points in Iowa, 8 points in New Hampshire, and 1 point in the biggest delegate prize, the Super Tuesday state California.

One hastens to add: The Sanders surge, like the Elizabeth Warren warming period from mid-September to mid-November and the Pete Buttigieg bump in December, may not last.