Just when you thought the Obama administration couldn't antagonize America any further, along comes Education Secretary Arne Duncan. He didn't just attack "white suburban moms" and children over their criticism of the Common Core "standards"/testing/data-mining program. The feds' top educrat also managed to insult every one of the nation's minority families and educators who oppose Fed Ed's threat to academic excellence, local control and student privacy. On Friday, while defending the beleaguered Common Core program in a meeting with state school superintendents, Duncan unleashed a brazen race and class warfare attack on grassroots foes. As The Washington Post reported, Duncan...