For example, the US Congress has blocked changes to countries’ quota allocations at the International Monetary Fund. And a group of 47 Republican senators wrote a letter to Iran’s leaders announcing that the next Congress may not honor whatever nuclear deal they reach with Obama.
一个答案是国内政治僵局严重制约了总统在国际谈判中的手脚。比如，美国国会拒不批准国际货币基金组织各国配额分配的改革方案。47位共和党参议员集体致信伊朗领导人，宣称下一届国会将不支持他们与奥巴马所达成的任何核协议。