By E.J. Dionne, Jr.Our nation confronts a challenge this Fourth of July that we face but rarely: We are at odds over the meaning of our history and why, to quote our Declaration of Independence, “governments are instituted.” Only divisions this deep can explain why we are taking risks with our country’s future we’re usually wise enough to avoid. Arguments over how much government should tax and spend are the very stuff of democracy’s give-and-take. Now, the (...)