Apparently Carter has managed to alienate many colleagues. I read that Ted Kennedy couldn't stand him. Apparently Reagan didn't like him nor did Clinton or either of the Bushes.
He did have a close friendship with Gerald Ford after he left office, but that was it. Before Ted Kenney's funeral I noticed Hillary Clinton was seated next to George W. Bush, and they were carrying on like they were best friends. Evidently Nancy Reagan has been very supportive of Obama because of his views on stem cell research. I would think anyone who has been president or first lady would be extremely respectful of his or her living counterparts because no one can know what it is like except the few who have been in that spot.