The US at the federal level has other mandatory retirement ages, where the most similar role affected is the Foreign Service, but also pilots, air traffic contr

The US at the federal level has other mandatory retirement ages, where the most similar role affected is the Foreign Service, but also pilots, air traffic control, and law enforcement. Many states have mandatory retirement ages for judges. One can easily argue that the risks if a senator undergoes cognitive decline are potentially just as serious as if a diplomat or judge has the same problem.