When overwhelming means obliteration

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Donald Trump threatened to hit Iran with "great and overwhelming force" if the Republic attacks the U.S. in any way now that it has shut the door on diplomacy. "In some areas, overwhelming will mean obliteration," he tweeted. President Hassan Rouhani was reported to have said the Trump administration suffered from "mental retardation," though a more precise Farsi translation would be "the White House has a mental disorder" that's leading it to do unwise things.