Democrats are searching for a cabinet nominee to defeat, and it’s telling that progressive enemy number one is Betsy DeVos.Donald Trump’s choice to run the Education Department has committed the unpardonable sin of devoting much of her fortune to helping poor kids escape failing public schools.

Progressives and their media allies have spent the last week roughing up Mrs. DeVos in preparation for her Senate confirmation hearing on Tuesday, which will feature the charms of Elizabeth Warren and Bernie Sanders. Liberals claim that Mrs. DeVos, wife of former Amway president Dick DeVos, is unqualified to lead the Education Department because she’s never been a teacher.

Yet the same crowd howls that bankers shouldn’t be regulating banks. Which is it? Managing a bureaucracy isn’t like running a classroom, though both require a steely resolve. Most Education secretaries have been former teachers or school superintendents—not that student test scores are better for it.

Perhaps Mrs. DeVos’s most important qualification is that she has the courage of her convictions. Progressives are willing to brook billionaires who use their wealth to expand government or augment their political influence. Hyatt heiress Penny Pritzker, whose family is a major Democratic patron, served as President Obama’s Commerce secretary. But a conservative who’s dedicated her private fortune to liberating poor kids trapped in lousy public schools? The horror!

The DeVoses have donated tens of millions of dollars to charity including a children’s hospital in Michigan and an international art competition in Grand Rapids. They’ve also given to Christian organizations, which the left cites as evidence of concealed bigotry. Yet education has been their main philanthropic cause.