It looks like President Biden’s education secretary needs a crash course on the Constitution. That’s what we take from Miguel Cardona’s remarks suggesting he plans to put the squeeze on America’s colleges to stamp out the practice of giving a leg up in the admissions process to the children of alumni. “I would be interested in pulling whatever levers I can pull,” he tells the AP, to eliminate this “legacy” preference in search of racial diversity.

One would think Mr. Cardona would have taken note of the most important education case to have come down from the Supreme Court in recent years, Students for Fair Admissions v. Harvard. Mr. Cardona seems to have missed its meaning. The point of the case isn’t merely that Harvard and other colleges were trying to achieve racial diversity the wrong way — it’s that the pursuit of racial diversity in and of itself is unconstitutional.