You don't understand how the Civil War was a constitutional crisis hinging on states believing their rights were being infringed by the federal government? Really? You need that explained to you? You need me to explain to you how states seceding over fears of the federal government usurping their "right" to own slaves is related to the state/federal divide?
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Be honest, have you ever taken an American history class, or read a book on it? FDR wasn't even in office until 1933, when that deflation spike was already towards the bottom.