Question: The American attorney, politician and author serving as a republican government official has served for how many years?

Context paragraphs:
Abdul Rahman al-Iryani: Abdul Rahman Yahya Al-Eryani (Arabic: عبد الرحمن الإرياني‎ ‎ ) (10 June 1910 – 14 March 1998) was the President of Yemen Arab Republic from 1967 to 1974.  He was born in Yemen in 1908.  He was the President of the Yemen Arab Republic from 5 November 1967 to 13 June 1974.  Al-Eryani was a leader of the Al-Ahrar opposition group, during the time of the Mutawakkilite Kingdom of Yemen.  He served as Minister of Religious Endowments under North Yemen's first republican government and is the only civilian politician to have led Northern Yemen.

Orrin Hatch: Orrin Grant Hatch (born March 22, 1934) is an American attorney, politician, and author who has been the president pro tempore of the United States Senate since January 2015.

Michelle Park Steel: Michelle Eunjoo Park Steel (born June 21, 1955) is an American Republican government official.  She is a member of the Orange County Board of Supervisors and a former member of the California State Board of Equalization.

Henry E. Petersen: Henry E. Petersen (1921-1991) was an American attorney and government official.  He served as United States Assistant Attorney General during the Richard Nixon and Gerald Ford administrations.  Petersen conducted many interviews during the Watergate scandal.  Petersen was perhaps the only investigator to research allegations of US voting fraud in the 1970s.

Arthur H. Vandenberg Jr.: Arthur Hendrick Vandenberg Jr. (June 30, 1907 – January 18, 1968) was a Republican government official from Michigan.  He worked for many years on the staff of his father, Arthur H. Vandenberg (1884–1951), who served in the U.S. Senate from 1928 to 1951.  He was briefly appointed to Eisenhower's White House staff in November 1952 but resigned in 1953 at the very start of the Eisenhower administration.  He also worked as a consultant and academic and edited his father’s papers for publication.

Ema Derossi-Bjelajac: Ema Derossi-Bjelajac (sometimes rendered Derosi-Bjelajac) is a Croatian politician who served as the President of the Presidency of the Socialist Republic of Croatia (a constituent republic of the Socialist Federal Republic of Yugoslavia) from 1985 until 1986 and was simultaneously the President of the Executive Council of the Socialist Republic of Croatia.  She was the first woman to hold a title equivalent to a head of state, as well as the second woman (after Savka Dabčević-Kučar) to hold a post equivalent to a head of government, in modern day Croatia.  She served in a number of high-ranking functions within the League of Communists of Croatia and the Croatian republican government of the period: notably, she was a Member of the Central Committee of the League between 1964-1974, and was a Member and Deputy Speaker of the Croatian Parliament (Sabor) between 1978 and 1982.

United States Senate election in Utah, 1976: The 1976 United States Senate election in Utah took place on November 2, 1976.  Incumbent Democratic U.S. Senator Frank Moss ran for re-election to a fourth term but was defeated by his Republican opponent Orrin Hatch.  40 years after the election, Hatch is currently the longest-serving Republican Senator, having been re-elected for seven terms.

Edmund J. Brandon: Edmund John Brandon (May 24, 1894 – November 1, 1946) was an American attorney and government official who served as the Administrator of the U.S. Securities and Exchange Commission's Boston Regional Office, Zone 1 in 1935 and as the United States Attorney for the District of Massachusetts from 1939 to 1946.  He was born in Cambridge, Massachusetts.

Bill Nighbert: Bill Nighbert is a Republican government official in the U.S. state of Kentucky.

Antun Vujić: Antun Vujić (born in Dubrovnik, July 14, 1945) is a Croatian politician, philosopher, political analyst, lexicographer and author serving as a director of the Miroslav Krleža Institute of Lexicography since 2012.  He was a member of Croatian Parliament and Minister of Culture in the Croatian Government from January 2000 to December 2003.

Supporting paragraphs: United States Senate election in Utah, 1976 Orrin Hatch
Answer: 40 years