Betsy DeVos’s Senate confirmation hearings have offered a bright light in a dark time. The highlight reels posted to social media show Democratic senators revealing the billionaire’s ignorance on everything from pedagogical debates and student loans to federal law and the frequency of bear attacks.

These questions have not only been entertaining but also revealing. In the various attacks they’ve launched at the education secretary nominee — who does not believe in public education — the fault line between centrist and lefter-leaning Democrats has become even more apparent. In it, we can discern two different strategies of political battle for the next few years: the continued reliance on technocratic critiques versus resurgent class warfare.

Al Franken has served on the Senate’s education committee since 2009 and, to his credit, has spent those eight years studying important debates in education. He asked DeVos about one of these debates: “I would like your views on the relative advantage of measuring proficiency or measuring growth.”