President Barack Obama vigorously denied on Thursday that a $400 million cash payment to Iran was ransom to secure the release of four Americans jailed in Tehran. He defended the transaction as evidence that the nuclear accord with Iran has allowed for progress on other matters. “This wasn’t some nefarious deal,” Mr. Obama said during a news conference at the Pentagon. The money was delivered to the Iranian government in January, at the same time the nuclear deal was settled and the Americans were released. The payment was part of a decades-old dispute over a failed military equipment deal dating to the 1970s, before the Islamic revolution in 1979. Mr. Obama also answered political questions...
