Someday a future president may have to apologize to Iranians for Mr. Obama’s nonfeasance, just as Mr. Obama apologized for the Eisenhower administration’s meddling. But the better Eisenhower parallel is with Hungary in 1956. Then as now a popular uprising coalesced around a figure (Imre Nagy in Hungary; Mir Hossein Mousavi in Iran), who had once been a creature of the system. Then as now it was buoyed by inspiring American rhetoric about freedom and democracy coming over Voice of America airwaves.