There’s an Easy Test We Could Use to Assess Older Politicians’ Cognitive Health

At the end of the James Comey hearing, Sen. John McCain delivered a somewhat bewildering line of questioning, causing many to speculate and wonder over the senator's cognitive state and health. McCain quickly released a statement attributing the botched performance to sleep deprivation, saying that he stayed up too late watching baseball. But he can be all but assured that the public is likely to watch him closely going forward: The senator, who recently began a sixth term representing...