Are Joe Biden, Donald Trump, and Bernie Sanders all too old to be president in 2020? It's a question that is being asked, particularly of Biden, though the others are pretty darn close in age to him as well. Ageism is a bad thing, I agree. Though with a commander-in-chief, who also has access to nuclear weapons, should we also take into consideration things like their mental health, and in terms of age, things like dementia and Alzheimers? Age is less the issue than mental fitness- something which the presidency is curiously not held to any legal standard...