), a physician, told me during an "Axios on HBO" interview that he favors cognition tests for aging leaders of all three branches of government.
Cassidy, a gastroenterologist, told me during our wide-ranging interview in Chalmette, La., that in your 80s, you begin a "rapid decline.".
So anybody in a position of responsibility who may potentially be on that slope, that is of concern.
"I'm told that there have been senators in the past who, at the end of their Senate terms were senile," Cassidy added.
Asked if he'd favor such a test for those leaders, Cassidy said: "Of course.".
Go deeper: Cassidy warns of "true colors" test. »