Many people think that because Ted Cruz was a good law student or a good lawyer he is therefore smart, smart at everything he does. They are wrong. Being a good law student does not mean that you are a smart parent, for example. Or a smart driver, or a smart eater. Or a smart senator. Law school performance is a predictor of nothing–including your potential ability as a lawyer. And there are many high functioning lawyers who are absolutely terrible at everything else they do.

— Lawrence O’Donnell via NBC News