Mr. Trump and his top officials insist that is not their goal — especially not through the use of force. “We do not seek war, we do not seek nation-building, we do not seek regime change,” the president said in remarks this month. It is clear, however, that administration officials hope to undermine the Iranian government. Early in Mr. Trump’s presidency, a memo that circulated in his White House written by the Foundation for Defense of Democracies, a hawkish Washington think tank, suggested “a strategy of coerced democratization” for Iran.