Question: Which Holocaust survivor is grandfather to the son-in-law and senior advisor to President of the United States Donald Trump.? 
Context: Rick A. Dearborn is currently the White House Deputy Chief of Staff for Legislative, Intergovernmental Affairs and Implementation and formerly the executive director of Donald Trump's presidential transition team.  Dearborn has worked for six U.S. Senators, including two members of Senate leadership, and spent more than 25 years working on Capitol Hill.  He was nominated by President George W. Bush and confirmed by the Senate to become the Assistant Secretary of Energy for Congressional Affairs, where he worked with the Senate, House and Tribal Governments on achieving President George W. Bush's Energy Agenda.  Rick Dearborn was a member of Donald Trump's presidential transition team, a group of advisors tasked with recommending presidential appointments for the incoming administration.  Dearborn had previously worked as the Chief of Staff for Senator Jeff Sessions from December 2004 until 2016.  Dearborn, along with Senior Advisor Stephen Miller, is one of two former senior Sessions staffers to have a senior role in Trump's White House. The Stop Trump movement, also called the anti-Trump, Dump Trump, or Never Trump movement, was the informal name for the effort on the part of some Republicans and other prominent conservatives to prevent front-runner and now President of the United States Donald Trump from obtaining the Republican Party presidential nomination, and, following his nomination, the presidency, for the 2016 United States presidential election.  Although Trump's campaign drew a substantial amount of criticism, he was ultimately elected in November 2016 and sworn in as president on January 20, 2017. Joseph Kushner (October 10, 1922 – October 5, 1985) was an American real estate magnate, and the father of Murray Kushner and Charles Kushner, and grandfather of Jared Kushner, Joshua Kushner, and Marc Kushner.  He came to the US as a Holocaust survivor from Belarus in 1949.  At the end of his career, he handed out to his successor control of 4,000+ apartments, houses, and properties. Joshua Kushner (born June 12, 1985) is an American businessman and investor.  He is the founder and managing partner of the investment firm Thrive Capital, co-founder of Oscar Health, and the son of real estate magnate Charles Kushner.  His brother is Jared Kushner, the son-in-law and senior advisor of the US President Donald Trump. The Donald J. Trump Foundation is a New York-based private foundation founded and chaired by President of the United States Donald Trump.  It has been a source of controversy, criticism and scrutiny.  The foundation has been fined for making political contributions and admitted engaging in self-dealing practices to benefit Trump, his family, and businesses.  On December 24, 2016, Trump said he intended to dissolve the foundation; as of 2017 he has not done so. The 2017 Mexico–United States diplomatic crisis is a diplomatic stagnation between both North American nations due to the recent friction between their current presidents.  It began when the President of the United States Donald Trump, threatened Mexico with renegotiating the North American Free Trade Agreement because he considers it not to be beneficial to his country, and also said that he would amplify the barrier that already exists between both countries; Mexican President Enrique Peña Nieto said he opposed both proposals.  Later, Donald Trump and Enrique Peña Nieto canceled a meeting they had scheduled in Washington D.C. 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. The Donald Trump presidential campaign, 2020 is an ongoing re-election campaign by President of the United States Donald Trump, who took office on January 20, 2017. Trump Unauthorized is a 2005 biographical television film about businessman and future president of the United States Donald Trump.  The film was directed by John David Coles and written by Keith Curran, and stars Justin Louis as Trump.  The film chronicles Trump's life, including his career and his marriages to Ivana Trump and Marla Maples.  "Trump Unauthorized" is based on multiple sources, including two biographies by Gwenda Blair titled "The Trumps: Three Generations That Built an Empire" and "Donald Trump: Master Apprentice". Charles Kushner (born May 16, 1954) is an American real estate developer.  He founded Kushner Companies in 1985.  In 2005, he was convicted of illegal campaign contributions, tax evasion, and witness tampering, and served time in federal prison.  After his release, he resumed his career in real estate.  His son is Jared Kushner, who is the husband of Ivanka Trump and son-in-law and senior advisor to President of the United States Donald Trump.
Answer: Joseph Kushner