The magnanimity, selflessness and sheer balls — not to mention the scorching indictment of the media’s herd mentality and the resulting inanity of the political discourse in this country in the year 2015 — of Bernie Sanders in this moment showed leadership — not cunning, not calculation, not talking points, not poll-tested, focus-grouped gotcha zingers but real leadership — above and beyond anything else offered on that debate stage last night.