Question: On December 13, 2016 the second youngest Governor in the US endorsed who for Chairman of the Missouri Republican Party?

Context paragraphs:
Missouri Republican Party: The Missouri Republican Party is the affiliate of the United States Republican Party (GOP) in Missouri.  The party Chairman is Todd Graves, brother of Missouri congressman Sam Graves.  Todd Graves was unanimously elected to the position on January 7, 2017.

Georgia gubernatorial election, 1962: The Georgia gubernatorial election of 1962 was held on November 6.  This election was notable for a number of reasons: First, it was the last gubernatorial election in Georgia to date where the Republican Party did not field a candidate.  Second, the primary election was the first that took place under a winner-take-all system, as the previously used County Unit System had been struck down by the US Supreme Court in "Gray v. Sanders."  Finally, upon election, Carl Sanders became the youngest governor of a state at the time (aged 37) and the first governor from an urban area since the 1920s.

Todd Graves (attorney): Todd P. Graves is a private practice attorney, Republican lawyer and politician, who previously served as United States Attorney for the Western District of Missouri.  A twice-elected state prosecutor who is currently in private practice with the law firm Graves Garrett LLC, his practice focuses on representing individuals and businesses nationwide before federal and state courts and administrative agencies.  Graves was born and raised in Tarkio, Missouri.  His brother is U.S. Representative Sam Graves.  On December 13, 2016, Missouri Governor-Elect Eric Greitens announced his endorsement of Graves for Chairman of the Missouri Republican Party.

Louisiana gubernatorial election, 1868: The Louisiana gubernatorial election, 1868, was the first election to take place under the Louisiana Constitution of 1868.  As a result of this election Henry C. Warmoth was elected Governor of Louisiana.  At age 26 he was the youngest governor in the state's history.  The result was a lop-sided result for Warmoth because of the Republican Party's overwhelming support amongst the freedmen who were the voting majority in the state at the time.

Missouri Senate elections, 2010: The 2010 Missouri Senate elections were held on November 2, 2010.  Voters in the 12 even-numbered districts of the Missouri Senate voted for their representatives.  Other elections were also held on November 2.  The Missouri Republican Party gained three seats and maintained control of the Missouri Senate.

Eric Greitens: Eric Robert Greitens (born April 10, 1974) is an American politician, author, and former Navy SEAL currently serving as the 56th Governor of Missouri, since January 2017.  He is currently the second youngest Governor in the United States, after New Hampshire's Chris Sununu.

Ishratul Ibad: Ishratul Ibad Khan (Urdu: ‎ , born 2 March 1963) was the 30th Governor of Sindh, Pakistan.  Ishratul lbad is a Pakistan-born citizen and he also holds dual nationality as a British citizen.  He took up the post of Governor of Sindh, Pakistan on 27 December 2002, becoming the youngest governor to hold the office.  On 16 July 2008, he became the province's longest-serving governor.  He resigned on 27 June 2011, but his resignation was not accepted by the President of Pakistan.  He resumed his official Governor duties from Tuesday, 19 July 2011.  On 9 November 2016, he was removed as Governor of Sindh and replaced by Saeeduzzaman Siddiqui.

Missouri Republican primary, 2016: The Missouri Republican primary took place March 15 in the U.S. state of Missouri, as a part of the Republican Party's series of presidential primaries ahead of the 2016 presidential election.  The Missouri primary was held alongside Republican primary elections in Florida, Illinois, North Carolina and Ohio, along with the Democratic contest in Missouri.

Lee Roupas: Lee Roupas is the Palos Township Republican Committeeman as well as the Former Chairman of the Cook County Republican Party Cook County, Illinois.  At a national level, Lee worked on the re-election campaign of President George W. Bush in Washington, D.C. as a Surrogate Event Coordinator, planning rallies for the President in battleground states across the country.  He served the Republican Party on the 2004 Republican National Convention staff.  He served the Party on the 55th Presidential Inauguration staff and later as the Communications Director for the Republican Party of Virginia.  Prior to being elected Chairman of the Cook County Republican Party, he served on the Cook County GOP Executive Committee under Chairmen Gary Skoien and Liz Gorman.

Republican Party of Louisiana: The Republican Party of Louisiana is the U.S. state of Louisiana's organization of the national Republican Party.  The state chairman is Roger F. Villere, Jr., a businessman from Metairie in Jefferson Parish, who has been repeatedly re-elected since 2004.  Since the late 20th century, white conservatives in the states have mostly shifted to the Republican Party from the Democratic Party.  s of 2016 , every statewide elected official in Louisiana, with the exception of the governor, is a Republican.

Supporting paragraphs: Todd Graves (attorney) Eric Greitens
Answer: Todd P. Graves