此前，特朗普已多次就对普京的不满公开表达过个人看法。 本月14日，美国总统特朗普宣布一项涉俄声明。特朗普当天表示，如果俄罗斯没有在50天内 同乌克兰达成和平协议，美国将对俄罗斯征收"非常严厉"的关税。一名白宫官员稍后向媒体 记者解释说，特朗普的意思是，如果俄乌50天内达不成协议，美国将对俄罗斯征收100%的 关税，对购买俄罗斯石油的国家征收次级关税。 来源：央视新闻客户端 当地时间7月28日， 正在英国苏格兰进行访问的美国总统特朗普表示，他对俄罗斯总统普京 感到非常失望。 特朗普还表示， 他正在缩减此前用以给俄罗斯与乌克兰达成协议所设定的50 天期限 。 特朗普说，他对普京是否愿意达成协议表示怀疑。 ...

Core Viewpoint - The article highlights President Trump's disappointment with President Putin and his skepticism regarding the potential for a peace agreement between Russia and Ukraine, indicating a shift in the U.S. stance towards Russia [1] Group 1: U.S.-Russia Relations - President Trump expressed significant disappointment in President Putin during his visit to Scotland [1] - Trump is reducing the previously set 50-day deadline for Russia and Ukraine to reach a peace agreement, reflecting a more cautious approach [1] - The U.S. administration has indicated that if no agreement is reached within the new timeframe, severe tariffs will be imposed on Russia [1] Group 2: Tariff Implications - Trump announced that if Russia fails to reach a peace agreement with Ukraine within 50 days, the U.S. will impose a 100% tariff on Russian goods [1] - Additionally, secondary tariffs will be applied to countries purchasing Russian oil, indicating a broader economic strategy to pressure Russia [1]