Editorial: How healthy are the candidates?

Questioning your opponent's health is one of the oldest tricks in the political playbook. Dwight Eisenhower's heart attack was used against him in 1956. Four years later, the John F. Kennedy campaign vigorously denied charges from Lyndon Johnson's campaign that JFK had been diagnosed with Addison's disease. Rumors about John Kerry's health surfaced in 2004; rumors about John McCain's health in 2008.Often the rumors are false. President Ronald Reagan called Democratic nominee Michael Dukakis [...]