Trump should come clean about his all-too-obvious decline

‘Transparency about the president’s health should be the rule, not the exception.’ Photograph: Evan Vucci/Reuters

American presidents don’t have a stellar record of transparency about their health problems.

After a polio diagnosis that caused paralysis of his lower body, Franklin Delano Roosevelt used a wheelchair to get around, but went to great lengths to conceal it from the public. John F Kennedy suffered debilitating back pain, but most Americans never had a clue, seeing only a vigorous and youthful politician.