Special Edition for Dec. 29. Jimmy Carter, America’s 39th president and the one with the longest post-presidency, has died . Former WSJ Washington editor Gerald F. Seib discusses Carter’s legacy, from the famous Oval Office address that tackled an energy crisis with a rare, introspective call to action, to the foreign-policy error that may have cost him re-election in 1980 and a post-presidency spent eschewing fame in favor of modesty and good works.

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