We Have Age Minimums. Why Not Age Maximums?

The median age of senators is 65. We’re heading into a presidential contest that might find candidates who are 78 and 82 facing off on Election Day. Our government, people have argued, is a gerontocracy. But is that a bad thing? Should our older leaders take a back seat? And for all of us, how do you know when it’s the right time to retire?