Vera: As we get older, learning novel information becomes an issue (has to do with neurons in our brains). Both, Hillary and Donald are at that category. But, the difference between the two of them is that governing and politics have been Hillary profession for most of her life, while Donald is new to those governing issues and has to learn it. That’s the reason that Trump, at 70 years old, cannot learn new ‘tricks’. Therefore, I’m sad to say, he (Trump) cannot, and would never fit for the presidency.