Question: Who is the president of the National Policy Institute, a white supremacist think tank, that instigated Thor Harris to post "How to Punch a Nazi" to twitter?

Context paragraphs:
Economic Policy Institute: The Economic Policy Institute is a 501(c)(3) non-profit American think tank based in Washington, D.C. that carries out economic research and analyzes the economic impact of policies and proposals.  The EPI describes itself as a non-partisan think tank that "seeks to include the needs of low- and middle-income workers in economic policy discussions".  It is affiliated with the labor movement, and is usually described as presenting a liberal viewpoint on public policy issues.  The EPI has a sister organization, the EPI Policy Center, which is a 501(c)(4) organization for advocacy and education.  The EPI advocates for policies favorable for low- to moderate-income families in the United States.  The EPI also assesses current economic policies and proposes new policies that EPI believes will protect and improve the living standards of working families.

Caleb Crosby: Caleb Crosby is an American think tank executive.  In 2014, he became president of the Alabama Policy Institute (API), a conservative think tank based in Birmingham, Alabama.  Crosby had previously served as API's vice president and chief financial officer.  Prior to joining the think tank, Crosby worked for the 2004 re-election campaign of George W. Bush.  He served in the George W. Bush administration at the Environmental Protection Agency and later at the White House, where he traveled with President Bush as a financial advisor.  Crosby also worked at the United States Department of the Treasury and as CFO of the National Republican Congressional Committee.

IMANI Centre for Policy and Education: The '"IMANI Center for Policy and Education"' is an African think tank based in Accra, Ghana.  As a member of the Atlas Economic Research Foundation, the think tank applies free market solutions to intricate domestic social problems.  It was founded in 2004 by Franklin Cudjoe, who currently serves as the president and chief executive officer.  The think tank's operations center on these four thematic areas: rule of law, market growth and development, individual rights, and human security and institutional development.  IMANI uses the Africanliberty.org platform as a springboard to reach out to the larger African audience in five international languages, including Swahili.IMANI exerts influence in the Ghanaian public education and policy sphere through media appearances, publications, research, and seminars.  The think tank is ranked by the Global Go To Think Tanks and Civil Societies Program, organized annually by the University of Pennsylvania.  According to the 2009 Index Report, IMANI was ranked fifth most influential in Sub-Saharan Africa, and the only African think tank to make the list of top 25 "Most Innovative" across the world.

James A. Baker III Institute for Public Policy: The James A. Baker III Institute for Public Policy, also known as the Baker Institute, is an American think tank on the campus of Rice University in Houston, Texas.  Founded in 1993, it functions as a nonpartisan center for public policy research.  According to the "2015 Global Go To Think Tank Index Report" (Think Tanks and Civil Societies Program, University of Pennsylvania), the institute is No. 18 (of 60) in the "Top Think Tanks in the United States" and No. 4 (of 45) of the "Best University Affiliated Thanks".  Its Center for Energy Studies is ranked No. 2 (of 55) among the world’s energy- and resource-policy think tanks, according to the Think Tanks and Civil Societies Program’s 2015 Index Report.  It is named for James A. Baker, III, former United States secretary of state and secretary of the Treasury.  The institute's director Edward P. Djerejian is the former United States ambassador to Israel and Syria and assistant secretary of state for Near Eastern Affairs.  The institute's board of advisors include William Barnett (Chair), Colin Powell, Madeleine Albright and Rice University's President David Leebron.

Thor Harris: Thor Harris (born February 7, 1965) is a musician, painter, and carpenter.  He was the percussionist for Swans (2010–2016).  He has performed with Shearwater (2001–2010), a band from Austin, Texas, Bill Callahan, The Angels of Light, Lisa Germano, Gretchen Phillips, Devendra Banhart, Rebecca Cannon, Swans, Flock of Dimes & Amanda Palmer and the Grand Theft Orchestra.  He has recorded six instrumental albums with the Austin producer Rob Halverson.  He also contributed to Ben Frost's 2014 album, "Aurora".  In February 2017, he posted a video to his Twitter account titled "How To Punch A Nazi" as a response to the rise of Richard Spencer and other popular Neo-Nazis and on February 8, 2017, Twitter briefly suspended Harris's account for the video.

Richard B. Spencer: Richard Bertrand Spencer (born May 11, 1978) is an American white supremacist.  He is president of the National Policy Institute, a white supremacist think tank, as well as Washington Summit Publishers.  Spencer has stated that he rejects the label of white supremacist, and prefers to describe himself as an identitarian.  He has advocated for a white homeland for a "dispossessed white race" and called for "peaceful ethnic cleansing" to halt the "deconstruction" of European culture.

National Policy Institute: The National Policy Institute (NPI) is a white supremacist think tank based in Alexandria, Virginia.

Wang Huiyao: Dr.Wang, Huiyao (Henry) (; born July 2, 1958) is the Founder and President of Center for China and Globalization (CCG),the largest independent global think tank in China which has over 100 full-time researchers and working staff.  According to the "2016 Global Go To Think Tank Index" by the University of Pennsylvania Think Tank and Civil Society Program (TTCSP), the most prestigious think tank ranking in the world, CCG ranked 111th of the top world think tanks and was one of the world's top 40 independent think tanks.  TTCSP ranked CCG as the 7th top think tank in China and No. 1 independent think tank among the top Chinese think tanks.  Dr. Wang is also a top adviser to the Chinese government.  He was appointed as Counselor for China State Council by the Chinese Premier in 2015.  Dr. Wang is a well-known thought leader on China and globalization, China going global, Chinese global migration and talent flows, Chinese students studying abroad and returnees, and on global think tanks.  He is also a top adviser to international organizations such as World Bank, IOM and ILO as well as to global MNCs.  Dr. Wang has an impressive work career span over both Chinese and foreign governments, multinational executive, social entrepreneurial and academic fields.

Jared Taylor: Samuel Jared Taylor (born September 15, 1951) is an American white nationalist and white supremacist.  He is the founder and editor of "American Renaissance", a white supremacist magazine.  Taylor is also an author and the president of "American Renaissance"' s parent organization, New Century Foundation, through which many of his books have been published.  He is a former member of the advisory board of "The Occidental Quarterly", and a former director of the National Policy Institute, a Virginia-based white nationalist think tank.  He is also a board member and spokesperson of the Council of Conservative Citizens.

Foreign Policy Institute: The Foreign Policy Institute (Turkish: "Dış Politika Enstitüsü" or "DPE") is a Turkish think tank on foreign policy and international relations.  It was founded in 1974.  The Foreign Policy Institute is the first ever Think Tank formed in Turkey.  The founder and the incumbent director is Seyfi Tashan.

Supporting paragraphs: Thor Harris Richard B. Spencer
Answer: Richard Bertrand Spencer