Well, on the bright side, the Supreme Court, for a change, is paying attention to the 10th Amendment
The 10th Amendment is not absolute where state abridgment of constitutionally enumerated protections is a problem.
Noting that I am not familiar with referenced school district please consider the following.
Are legal majority citizens in referenced Pennsylvania school district being reasonably represented by school board? Or did conservative voters, if any, possibly get lazy and stay home on election day?