Public schools were the great social and economic leveler for the last century of American history; Republicans want to end that and instead advantage wealthy children over their lower-income peers, particularly those whose skin is darker than Trump’s spray tan.
Public schools (and free college) made it possible for America to produce an explosion of invention and innovation throughout the mid-20th century; now other countries are surpassing us, as the dumbing-down of our kids has become institutionalized in Red state after Red state.