Trump dreams of The Gilded Age Trump is the dumbest rock of dumbest rocks with his tariff fetish. He’s invoking the ghost of William McKinley. Heather Cox Richardson this morning: By pointing to McKinley’s presidency to justify his economic plan, Trump gives away the game. The McKinley years were those of the Gilded Age, in which industrialists amassed fortunes that they spent in spectacular displays. Cornelius and Alva Vanderbilt’s home on New York’s Fifth Avenue cost more than $44 million in today’s dollars, with stables finished in black walnut, cherry, and ash, with sterling silver metalwork, and in cities across the country, the wealthy dressed their horses and coachmen in expensive livery, threw costly dinners, built seaside mansions they called “cottages,” and wore diamonds, rubies, and emeralds. When the daughter of a former senator married, she wore a $10,000 dress and a diamond tiara, and well-wishers sent “necklaces of diamonds [and] bracelets of diamonds, sapphires, and rubies.” Americans believed those fortunes were possible because of the tariff walls the Republicans had begun to build in 1861. Before the Civil War, Congress levied limited U.S. tariffs to fund the federal government, a system southerners liked because it kept prices low, but northerners disliked because established industries in foreign countries could deliver manufactured goods more cheaply than fledgling U.S. industries could produce them, thus hampering industrial development. So, when the Republican Party organized in the North in the 1850s, it called for a tariff wall that would protect U.S. manufacturing. And as…