Trump’s Dr. Oz appearance has nothing to do with health But how healthy the candidates are (or aren’t) may not matter much anyway. Many presidents hid their ailments: JFK and Addison’s disease, FDR and polio, Woodrow Wilson’s stroke, Grover Cleveland’s mouth cancer. For the most part, says Robert Gilbert, a political scientist at Northeastern University, their presidencies went fine—their illnesses had little impact on their ability […]