A grain embargo would have enraged American farmers and put Mr. Reagan in the position of breaking his campaign promise to end the earlier embargo imposed by President Jimmy Carter.

• 如果对苏联实行谷物禁运，就会激怒美国的农场主，而且使里根自食其言：他在竞选时曾允诺要结束卡特总统早先实行的禁运措施。