In the fourteen fiscal years that preceded President Barack Obama’s inauguration in 2009, the tax receipts coming into the federal government’s Disability Insurance Trust Fund exceeded the benefits paid out, and the trust fund ran a surplus. In each of the five fiscal years Obama has served as president, the trust fund has run a deficit as the number of people receiving disability benefits has surged. The Disability Insurance Trust Fund has never before run five straight years of deficits. In fiscal 2013, which ended on Sept. 30, the Disability Insurance Trust Fund ran a record deficit of $31.494 billion,...