Julius Gehl (July 4, 1869, Bromberg, Province of Posen - March 1945, Danzig) was a German social democratic politician.
 Gehl served as the Chairman of the West Prussian District League of the Social Democratic Party of Germany (SPD).
 Gehl was a prominent leader of the Social Democratic Party of the Free City of Danzig during the interbellum years, serving as its chairman and parliamentary faction leader.
 Gehl also served as Vice President of the Senate of the Free City.
Michelle N. Kidani (born September 30, 1948 in Honolulu, Hawaii) is an American politician and a Democratic member of the Hawaii Senate since January 16, 2013 representing District 18.
 Kidani served consecutively from 2009 until 2013 in the District 17 seat.
Brian T. Taniguchi (born November 7, 1951 in Honolulu, Hawaii) is an American politician and a Democratic member of the Hawaii Senate since January 16, 2013 representing District 10.
 Taniguchi served consecutively from 1995 until 2013 in the District 10 and District 11 seats, having served consecutively in the Hawaii State Legislature from 1981 until 1995 in the Hawaii House of Representatives.
The Hawaiʻi State Senate is the upper chamber of the Hawaii State Legislature.
 The senate consists of twenty-five members elected from an equal number of constituent districts across the islands.
 The senate is led by the President of the Senate, elected from the membership of the body, currently Ron Kouchi.
 The forerunner of the Hawaii State Senate during the government of the Kingdom of Hawaiʻ i was the House of Nobles originated in 1840.
 In 1894 the Constitution of the Republic of Hawaii renamed the upper house the present senate.
 Senators are elected to four-year terms and are not subject to term limits.
 Like most state legislatures in the United States, the Hawaii State Senate is a part-time body and senators often have active careers outside government.
 The lower chamber of the legislature is the Hawaiʻi House of Representatives.
 The membership of the Senate also elects additional officers to include the Senate Vice President, Senate Chief Clerk, Assistant Chief Clerk, Senate Sergeant at Arms and Assistant Sergeant at Arms.
Ron Kouchi is a Democratic politician and current 14th President of the Hawaiʻi Senate (replacing Donna Mercado Kim who lost her position in an unusual mid-year leadership reorganization).
John Mizuno is a Democratic politician and served as the Vice Speaker of the Hawaii House of Representatives from 2013 to 2017.
 He was first elected to the House in 2006, representing District 30.
 After redistricting, he became the Representative for District 28, winning more than 70% of the vote in the 2012 election.
 Mizuno has served as the Chair of the Human Services Committee from 2009 to 2012 and as the Vice Chair of the Health Committee from 2007 to 2008, and also as House Majority Whip from 2011 to 2012.
 Prior to elected office, Mizuno was an Administrative Hearings Officer for the Hawaii State Department of Human Services (1992-1998), a Special Investigator for the Hawaii Civil Rights Commission (1990 to 1991), a Judicial Law Clerk for the Honorable Judge Donald Tsukiyama of the Hawaii First Circuit Court (1991 to 1992), and a Special Investigator for the Department of Human Services Welfare Fraud Division in Hawaii (1998-2003), and a Legislative Staff Member for the Hawaii House of Representatives (2003 to 2006).
 He is a graduate of the University of Hawaii at Manoa BA in Sociology Class of 1986, Willamette University College of Law Doctorate in Law Class of 1990, and the Council of State Government's Toll Fellows Class of 2015 and the Council of State Government's Legislative Academy Class of 2008.
The president pro tempore of the United States Senate ( or ), also president pro tem, is the second-highest-ranking official of the United States Senate.
 of the United States Constitution provides that the Vice President of the United States is, despite not being a senator, the President of the Senate, and mandates that the Senate must choose a president "pro tempore" to act in the Vice President's absence.
 Unlike the vice president, the president pro tempore is an elected member of the Senate, able to speak or vote on any issue.
 Selected by the Senate at large, the president pro tempore has enjoyed many privileges and some limited powers.
 During the vice president's absence, the president pro tempore is empowered to preside over Senate sessions.
 In practice, neither the vice president nor the president pro tempore usually presides; instead, the duty of presiding officer is rotated among junior senators of the majority party to give them experience in parliamentary procedure.
Les S. Ihara, Jr. (born April 19, 1951 in Honolulu, Hawaii) is an American politician and a Democratic member of the Hawaii Senate since January 16, 2013 representing District 10.
 Ihara served consecutively from 1995 until 2013 in the District 9 and District 10 seats, having served consecutively in the Hawaii State Legislature from 1987 until 1995 in the Hawaii House of Representatives.
Russell S. Kokubun (born 1948), is a Democratic politician who became a member and Vice President of the Hawaii Senate.
Rosalyn 'Roz' H. Baker (born September 20, 1946 in El Campo, Texas) is an American politician and a Democratic member of the Hawaii Senate since January 16, 2013 representing District 6.
 Baker served consecutively from 2003 until 2013 in the District 5 seat, and previously served from 1993 until 1999, having served consecutively in the Hawaii State Legislature from 1989 until 1993 in the Hawaii House of Representatives.
 Baker was appointed to the Senate in 1993 and currently serves as the Senate Chair of Commerce and Consumer Protection.

Question: Which Democratic politician born in 1948 did Ron Kouchi choose as Vice President of the Hawaii Senate?
Answer: Russell S. Kokubun