Regarding Obama: A man in his position doesn't have the luxury to indulge his petty emotions. It's a character flaw that Richard Nixon indulged -- and we all know how well that worked out for Nixon.
Obama has a tin-ear on many issues, living as he does in a little echo chamber, so he WILL make a big mistake and go too far in attacking Romney. How can he not? His heart is full of hate and he has no one who will oppose him in his inner circle. It is embarrassing to have a president with such low self control.