Is it something to do with a brain disorder? Item: his numerous and inexplicable gaffes. Item: his odd suggestion that he may be only able to last one term. Item: his bizarre and reckless obsession with insuring a lasting legacy (memorial?) by forcing through unpopular policies. Item: his reliance on teleprompters (to cover up a fading memory?). This failure to release info on a physical exam is a major, major issue! Goes beyond privacy, to fitness to continue performance of the office!