Tuesday night's Democratic presidential debate in Detroit was widely expected to pit the two leading progressives in the field against each other. Instead, Sens. Bernie Sanders of Vermont and Elizabeth Warren of Massachusetts had each other's backs in fending off the other eight aspirants onstage.
They gave as good as they got, and emerged at least as strong as either was going in. That was particularly good news for Sanders, who had been perceived as ceding ground to Warren in recent months.