(By Joshua Dunn, associate professor of political science at the University of Colorado–Colorado Springs, and Martha Derthick, professor emerita of government at the University of Virginia) Insisting that it was not hostile to vouchers—or, by extension, to the children, parents, or private schools that could benefit from them—the Obama administration’s Department of Justice (DOJ) in August 2013 mounted an attack on Governor Bobby Jindal’s Louisiana voucher program that shocked the editorial page of the Washington Post (“Voucher Madness,” September 2, 2...