Every time a candidate of the left loses in a Democratic Party primary to another candidate (usually a liberal), her or his supporters are quick to cry “Foul Ball” and rail against “The Establishment.” Never is the idea entertained that maybe the other candidate had greater appeal, maybe a better game plan and maybe a more accurate read of voter sentiments. To ignore the latter interpretation, to dismiss it out of hand isn’t smart politics. It may feel righteous, but I doubt it will serve the left well in the longer run.