As a country, two things we have learned from Barack Obama is if things are going lousy blame the previous administration and if your successor fixes your mistakes, take credit for it. There are times, however, when predecessors have earned the responsibility for the bad things going on in the world. A great example is the rogue regime of crazies that are running Iran.
The “achievement” of Jimmy Carter’s that will endure for a long time will be the fact that there’s a bunch of Islamist crazies running Iran who want to control the entire Middle East, blow up Israel and the United States. God forbid! If the Iranian crazies who run the country ever get their hands on “the bomb” the resulting countless deaths will also be part of why we remember Jimmy Carter (and Barack Obama)
A few years ago there was an interesting analysis in the JPost about Carter and Iran.