Ahead of Betsy DeVos’s confirmation hearing Tuesday to be President-elect Donald Trump’s secretary of education, multiple media outlets offered helpful explainers on the “loaded lingo” and specialty terms in debates about America’s schools. The language in these fights is hotly contested, whether it’s private school voucher advocates adopting the term “opportunity scholarships” or charter school critics suggesting charters aren’t really public schools. (They are in fact publicly funded, though they’re run by nonprofits or for-profit companies.)

Perhaps the most nebulous term in these discussions—aside from “school reform” itself—is the simple phrase “school choice.” Sometimes it just means charters, which are strongly supported by the Obama administration and many mainstream Democrats. But it can also mean vouchers, which are generally opposed by the center-left for diverting taxpayer dollars to private schools that may be religious, virtual, or for-profit.

When DeVos appears before the Senate on Tuesday, part of the project for Democrats ought to be drawing distinctions—between charters and vouchers, but also between good charters and bad charters. They may have internal divisions on these issues, but Democrats should recognize that DeVos represents not just an unprecedented threat to public education but the worst of the “school choice” movement.

Republicans will say Democrats are fear-mongering. The Wall Street Journal mocked DeVos’s critics in a weekend editorial, arguing that the nominee “committed the unpardonable sin of devoting much of her fortune to helping poor kids escape failing public schools.” But DeVos, a billionaire Republican donor and former GOP party chair in Michigan, has been a leading financial backer of the worst kind of “school choice” in her state and across America: vouchers, plus charters that are unregulated and unaccountable.

“For choice advocates on the left,” The Washington Post recently reported, “Michigan is a prime example of how not to promote school choice. There is no limit on the number of charter schools; there are dozens of entities with legal power to approve new charters, with varying levels of oversight; and there are too many poor-performing charters, they argue.”