Hillary Clinton has been fighting off questions about her health throughout the 2016 presidential election, but the topic returned to the fore after she nearly fainted at a 9/11 commemoration ceremony and then revealed she'd contracted pneumonia. Clinton, 68 -- or Donald Trump, 70, who has released scant detail about his own medical history -- would be among the oldest presidents ever elected. This week, Celeste and John speak with distinguished historian and presidential biographer Robert Dallek of Stanford University about the astoundingly secretive culture surrounding the wellness of our leaders and ask a simple question: How much do voters have a right to know about their health? This episode was produced by Alan Haburchak.