“Iran’s supreme leader effectively rejected a U.S. proposal that allows temporary uranium enrichment in the country before ending it completely, forcing the White House to reconsider its approach as tensions mount over Iran’s nuclear program,” the Wall Street Journal reports.Said Ayatollah Ali Khamenei: “To the American side and others we say: Why are you interfering and trying to say whether Iran should have uranium enrichment or not? That’s none of your business.”