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This paper analyzes presidential candidate Donald Trump’s revised tax proposal, which would significantly reduce marginal tax rates, increase standard deduction amounts, repeal personal exemptions, cap itemized deductions, and allow businesses to elect to expense new investment and not deduct interest expense. His proposal would cut taxes at all income levels, although the largest benefits, in dollar and percentage terms, would go to the highest-income households. Federal revenues would fall by $6.2 trillion over the first decade before accounting for added interest costs. Including interest costs, the federal debt would rise by $7.2 trillion over the first decade and by $20.9 trillion by 2036.