It\u2019s March 2013. The G.O.P., in tatters, issues a scathing report blaming its electoral failures on an out-of-touch leadership that ignores minorities at its own peril. Just three years later, Donald Trump proves his party dead wrong. Today, how certain assumptions took hold of both parties \u2014 and what they\u2019re still getting wrong \u2014 heading into the midterm elections.