What is with this obsession with Biden's age, as if there's a direct correlation to competence. This never comes up a topic of concern with Bernie Sanders, who is older by a year. Sure, I'd say Feinstein should have been retired 8 years or more before but instead she ridiculously hung on till death. And sure, age is a concern since the guy could die in office. But Biden isn't showing any signs of incompetence any more than Sanders. And certainly in better mental shape than his Republican rival who can barely string together 3 coherent sentences.