Last night’s Democratic debate exposed the contradictions within the party more vividly than anything yet this campaign season. On one side were Bernie Sanders and Elizabeth Warren, defending expansive redistributive policies like Medicare for All, a Green New Deal, and a wealth tax on the richest Americans. On the other side were indistinguishable centrist ciphers, responding with a steady mantra of “No, we can’t.”

But despite the best efforts of the moderators to prop up these bloodless mediocrities, Warren and Sanders could not be stopped. It’s now abundantly clear where the energy and dynamism in the Demoratic Party is. It’s with the Left.

The night started out with an extended section on health-care policy. This set the stage for the rest of the night, as it quickly became obvious that it was Bernie and Liz against the world. The moderators recycled tired talking points against Medicare for All, hammering again and again that it would “raise middle-class taxes,” as if the electorate has some bizarre preference for giving their money to insurance companies rather than the government. John Delaney responded with what the centrists clearly believed to be their trump card — that Medicare for All would take away union health-care benefits.