ジョン・ボルトン
On February 12, 2007, the White House submitted Khalilzad's nomination to the Senate to become the US ambassador to the United Nations. He was unanimously confirmed by the Democratic-controlled US Senate on March 29, 2007. That marked a strong contrast to Khalilzad's predecessor, John R. Bolton, whose often-controversial rhetoric caused him to fail to be confirmed by the Senate but obtained a recess appointment.