question: David Wurmser served as special assistant at the State Department to a diplomat that was appointed  U.S. ambassador to the United Nations by what president?
answer: George W. Bush
context: Title: Joseph E. Davies
  Passage: Joseph Edward Davies (November 29, 1876 – May 9, 1958) was an American lawyer and diplomat.  He was appointed by President Wilson to be Commissioner of Corporations in 1912, and First Chairman of the Federal Trade Commission in 1915.  He was the second Ambassador to represent the United States in the Soviet Union and U.S. Ambassador to Belgium and Luxembourg.  From 1939 to 1941 Davies was Special assistant to Secretary of State Hull, in charge of War Emergency Problems and Policies.  From 1942 through 1946 he was Chairman of President Roosevelt's War Relief Control Board.  Ambassador Davies was Special Advisor of President Harry Truman and Secretary of State James F. Byrnes with rank of Ambassador at the Potsdam Conference in 1945.
  Title: John R. Bolton
  Passage: John Robert Bolton (born November 20, 1948) is an American lawyer and diplomat who has served in several Republican administrations.  Bolton served as the U.S. ambassador to the United Nations from August 2005 until December 2006 as a recess appointee by President George W. Bush.  He resigned in December 2006, when the recess appointment would have otherwise ended, because he was unlikely to win confirmation from the Senate in which a newly elected Democratic Party majority would be taking control in January 2007.
  Title: Stuart Holliday
  Passage: Stuart W. Holliday is the President and CEO of the Meridian International Center, nonprofit organization that works with the U.S. Department of State, U.S. embassies, governments, public and private sector organizations, and leaders worldwide to promote global diplomacy, leadership development, educational, cultural exchanges, and diplomatic policy programs.  Holliday is the former U.S. Ambassador for Special Political Affairs at the United Nations and Special Assistant to President George W. Bush, and Associate Director of Presidential Personnel.
  Title: David Wurmser
  Passage: David Wurmser (born in Switzerland) is an American foreign policy specialist.  He served as Middle East Adviser to former US Vice President Dick Cheney, as special assistant to John R. Bolton at the State Department and as a research fellow on the Middle East at the American Enterprise Institute (AEI).  He served in the U.S. Navy Reserve as an intelligence officer at the rank of Lieutenant Commander.
  Title: Brett H. McGurk
  Passage: Brett H. McGurk (born April 20, 1973) is an American lawyer and diplomat who was appointed by President Barack Obama on 23 October 2015 as Special Presidential Envoy for the Global Coalition to Counter ISIL.  He replaced General John R. Allen to whom he had been a deputy since 16 September 2014.  He also served as Deputy Assistant Secretary of State for Iraq and Iran, at the U.S. Department of State, and from October 2014 through January 2016 led 14 months of secret negotiations with Iran that led to a prisoner swap and release of four Americans from Evin Prison in Tehran, including the Washington Post journalist, Jason Rezaian.  This assignment, among others, reinforced McGurk's "reputation as a doer", according to the NY Times.  He earlier served under President George W. Bush as Special Assistant to the President and Senior Director for Iraq and Afghanistan, and under President Obama as Special Advisor to the U.S. National Security Council and Senior Advisor to the U.S. Ambassador to Iraq.  An attorney by training, Mr. McGurk served as a law clerk to Chief Justice William H. Rehnquist on the U.S. Supreme Court during the Court's 2001 October Term.  On January 19, 2017, President-Elect Donald Trump's press secretary Sean Spicer announced that the incoming administration would retain McGurk in his role leading the counter-ISIS campaign.
citations: John R. Bolton David Wurmser