US president Barack Obama: The bubble is 'the hardest thing about the presidency'
US president Barack Obama says he would not run for a third term even if he could.
He says the presidency takes a toll on family life, and the office "should be continually renewed by new energy and new ideas".
Mr Obama says in an interview airing on CBS he is not yearning for a third term is because he is confident that things are lot better in the United States than when he came into office.
Mr Obama says the thing that makes him happiest about his presidency ending next January is a chance to get out of what he calls the "the bubble."
That is what he calls the tight security controls over his travels outside the White House.
He says the bubble is "the hardest thing about the presidency".