With swing-state polls reportedly driving some nervous Hillary Clinton supporters to check out housing prices in Canada, attention is turning to what many in both parties thought the impossible -- a Donald Trump presidency and what it might look like. Though the temperament and personality hardly match, there are enough parallels between the high-energy business tycoon and Dwight D. Eisenhower to make the avuncular Ike's Oval Office tenure six decades ago a predictor of a Trump presidency's features. The World War II hero and five-star Army general credited with winning the war in Europe wasn't rigidly ideological any more than...