We Should No Longer Doubt What the Democratic Party Is Today

The Democratic debates this week demonstrated that change isn’t just coming: It’s here. To watch Elizabeth Warren and Bernie Sanders dominate on stage against their more moderate foils was to realize that their positions are no longer marginal. CNN’s questions Tuesday night seemed designed to challenge the left-leaning proposals. That those positions were well-defended—and not unique to a single candidate—is a sign they may be more robust than conventional models suggest. Conditions have changed. During the exchanges over health care, it was clear there wasn’t an outlier Medicare for All...