Question: What country of origin does Michael Platt Jr. and Marsha Blackburn have in common?

Context articles: Michael Platt
BlueCrest Capital Management
Peter Platt
Michael Winstanley, Baron Winstanley
Carlie's Law
James H. Platt Jr.
Thomas Collier Platt Jr.
Sing It!
Michael Platt Jr.
Marsha Blackburn

Michael Platt (born 23 March 1984) is a rugby league player who plays for the Salford Red Devils; he joined the Salford Red Devils in April 2014 and is contacted until the end of the 2014 season following a successful trial with the Superleague club.
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Michael joined the Red Devils following 3 appearances with the North Wales Crusaders in 2014.
 Platt's 1st choice position is Full Back but he has been more effective at Centre for the Bradford Bulls winning the 'Rugby League World Centre of the Month' for August.
BlueCrest Capital Management is an American hedge fund which was founded by American William Reeves and Brit Michael Platt in 2000.
 The New York City-based company has registered offices in London, New York City, Boston, Geneva, Connecticut and Singapore.
 BlueCrest Capital Management is Europe’s third-biggest hedge-fund firm, managing over £30 billion.
 The firm's employees are estimated to number c.600.
Peter Platt (23 January 1883 – 1921) was an English footballer who played as a goalkeeper for Liverpool in The Football League.
 Platt started his career at Great Harwood as an amateur before he was signed by Blackburn Rovers F.C..
 He signed for Liverpool in 1902.
 He became first choice towards the end of the 1902–03 season and started the following as first choice as well.
 However, he lost his place to Ned Doig who became the club's new starting goalkeeper.
 He moved to Luton Town F.C. where he played 139 matches for the club from 1905 to 1909.
 He died at the age of 38 after an illness.
Michael Platt Winstanley, Baron Winstanley (27 August 1918 – 18 July 1993) was the Liberal Member of Parliament (MP) for Cheadle from 1966 to 1970 and, after boundary changes, MP for Hazel Grove - a newly created seat broadly comprising half of his former seat - from February to October 1974.
Carlie's Law was a bill introduced in the United States Congress by Representative Katherine Harris (R-FL), with the support of Nick Lampson (D-TX) and Marsha Blackburn (R-TN) in response to the kidnapping, rape and murder of 11-year-old Carlie Brucia by Joseph P. Smith, who was on probation at the time of Brucia's murder, having been released from state prison thirteen months prior.
James Henry Platt Jr. (July 13, 1837 – August 13, 1894) was an American physician, politician and businessman.
 After participating in the Virginia Constitutional Convention of 1868, Platt represented Virginia's 2nd congressional district in the U.S. Representative for two terms, from 1870-1875.
Thomas Collier Platt Jr. (May 29, 1925 – March 4, 2017) was a United States District Judge of the United States District Court for the Eastern District of New York.
Sing It!
 is an American situation comedy web series created by Benny Fine and Rafi Fine.
 It is executive produced by Benny Fine, Rafi Fine, Max Benator, Todd Lieberman, David Hoberman, Laurie Zaks, Barry Safchik, and Michael Platt, and produced by Mandeville Films, Potvin Sucks Productions, and Fine Brothers Entertainment.
 The pilot had a premiere on April 21, 2016, during the Tribeca Film Festival.
 The show debuted on May 25, 2016 on YouTube Red, a paid service of streaming original series and movies, similar to Netflix.
 It stars Mircea Monroe, Mark Sullivan, Debby Ryan, Preston Jones, Alex Désert, Todrick Hall, Missi Pyle and Ace Young.
 It received a 6.1 by 68 user reviews on IMDb.
Michael Richard Platt Jr. (born 1974) is an American political aide and government official who is currently the Assistant Secretary of Commerce for Legislative and Intergovernmental Affairs in the administration of U.S. President Donald Trump.
 Prior to assuming this position, he was chief of staff for U.S. Representative Marsha Blackburn of Tennessee's 7th congressional district.
Marsha Blackburn (née Wedgeworth; born June 6, 1952) is an American politician and former businesswoman.
 A member of the Republican Party, she represents southwest Tennessee 's 7 congressional district in the United States House of Representatives.
 She has served as chair on Subcommittee on Communications and the Internet since 2017.