With her campaign on life support, Hillary Clinton is making the one political argument that could hold the greatest sway with national Democrats: She is more electable.
It's hardly a surprising approach. Convinced of the party's vulnerabilities with the electorate and intimidated by opponents seen as masters of the black art of negative campaigning, Democrats are long accustomed to making electability their political lodestar.
But history shows that this is a shallow and counterproductive game -- one that can and should finally… more