As president, Carter gave the green light for Doo-hwan Chun to use force against the pro-democracy protests in Gwangju, S Korea.

Later, sent to N Korea by president Clinton, he massively exceeded his authority and made a sweetheart deal that guaranteed N Korea would eventually build nukes. President Clinton found out about the deal on CNN with everyone else and never used Carter again.

He also sandbagged president Reagan by taking a trip to the Soviet Union and convincing the leaders there that Reagan was not serious about reducing or eliminating nuclear weapons. This set back progress on reducing nuclear weapons for several years. In the end, Reagan was finally able to get them back to the table and eliminated a class of nukes, reducing others.