Question: Bryan Sterling, was an authority on the life and work of which American political commentator, humorist, and entertainer , he scripted and co-produced "Will Rogers' USA," a one-man Broadway play about Rogers starring actor James Whitmore, he was an American film, theatre, and television actor?

Context articles: Will Rogers Jr.
James Whitmore Jr.
Bryan Sterling
Give 'em Hell, Harry!
Wisdom of a Fool
Will Rogers' USA
Dariush Kashani
About Time (play)
James Whitmore
Corey Lewandowski

William Vann Rogers, generally known as Will Rogers Jr. (October 20, 1911 – July 9, 1993), was a son of legendary humorist Will Rogers (1879–1935) and his wife, the former Betty Blake (1879–1944).
 He was a Democratic U. S. Representative from California from January 3, 1943, until May 23, 1944, when he resigned to return to the United States Army.
 Rogers had several other careers, notably as a newspaper owner/publisher, actor, writer, and political commentator.
James Allen Whitmore III (born October 24, 1948), better known as James Whitmore Jr., is an American actor best known for his role as Captain Jim Gutterman on the television program "Baa Baa Black Sheep", and (since the 1980s) a television director.
 He is the son of actor James Whitmore.
Bryan Sterling (January 27, 1922 – March 13, 2008) was an authority on the life and work of American political commentator, humorist, and entertainer Will Rogers.
 He scripted and co-produced "Will Rogers' USA," a one-man Broadway play about Rogers starring actor James Whitmore, created a daily syndicated newspaper column that featured timely quotations from Rogers' writings, and authored several definitive biographies of Rogers' life including a detailed examination of his death in the Point Barrow, Alaska, crash of an airplane piloted by famed aviator Wiley Post.
Give 'em Hell, Harry!
 is a biographical play and 1975 film, written by playwright Samuel Gallu.
 Both the play and film are a one-man show about former President of the United States Harry S. Truman.
 "Give 'em Hell, Harry!"
 stars James Whitmore and was directed by Steve Binder and Peter H. Hunt.
Wisdom of a Fool is a one-man play based on the early life and career of actor and comedian Norman Wisdom.
 The play premiered at The Capitol Theatre Horsham in September 2015, which coincided with Wisdom's centenary.
 This is the first play to be written on the entertainer, which embarks on a UK tour in 2016/17.
 Theatres include Yvonne Arnaud Theatre, Little Theatre (Leicester), Marina Theatre, Theatre Royal Margate, Gaiety Theatre, Isle of Man, Middlesbrough Theatre, Theatre Royal Bury St Edmunds, Courtyard, Hereford, White Rock Theatre, New Wolsey Theatre, LOST Theatre, Jersey Arts Centre, Gala Theatre Durham, Broadway Theatre Letchworth, The Playhouse, Weston-super-Mare, Theatre Royal, Wakefield, Hazlitt Theatre, Theatre Royal Winchester, Devonshire Park Theatre, Queen's Theatre, Barnstaple, Falkirk Theatre, Hall for Cornwall
Will Rogers' USA is a one-man play about humorist Will Rogers that James Whitmore appeared in for more than 30 years.
 It was first staged by Frankie Hewitt at the Loretto-Hilton Theater in Webster Groves, Missouri in January 1970 and then at Ford's Theatre in September 1970.
 It was broadcast on television in 1972 and had a limited run on Broadway in May 1974.
 The Broadway production was produced by George Spota.
 The play was produced and conceived by George Spota, adapted and directed by Paul Shyre, with research by associate producer Bryan Sterling.
 Whitmore changed his monologue each time he performed it, using actual quotations from Will Rogers to comment on current events at the time of the performance.
Dariush Kashani is an American film, stage and television actor.
 Kashani gained critical acclaim for his role as Hassan Asfour in the 2017 Tony Award winning production of the Broadway play "Oslo" which went on to include a full sweep of the 2016-2017 awards season including the Lucille Lortel Award and the Outer Critics Circle Award for Outstanding New Broadway Play.
 Kashani also earned an Obie award along with company of "Oslo" for his work in the Off Broadway production at Lincoln Center.
 Stage productions include ""The Invisible Hand"" at New York Theatre Workshop and the Tony Kushner play Homebody/Kabul alongside Maggie Gyllenhaal at the Brooklyn Academy of Music.
 Notable works on screen include Bobby Tooch on "Ghost Whisperer" and Minister Tousi in "Madam Secretary".
About Time is a theatrical play written by playwright Tom Cole that debuted in 1990 Off Broadway at the John Houseman Theater.
 This two-character play featured an elderly couple, identified only as Old Man and Old Woman, chatting and arguing about matters around the subject of death.
 Directed by Tony Giordano, the play original production starred James Whitmore and Audra Lindley, described in a Mel Gussow review as an "endearing couple" who "act their way through and around the slight play that Tom Cole has created for them".
 Lindley and Whitmore had been married to each other and divorced in 1979, yet continued to perform with each other on stage.
James Allen Whitmore Jr. (October 1, 1921 – February 6, 2009) was an American film, theatre, and television actor.
 During his extensive career, Whitmore won a Tony, Grammy, Golden Globe, and an Emmy, and was nominated for two Academy Awards.
 He is one of only 78 performers to win three of the four EGOT honors.
Corey R. Lewandowski ( ; born September 18, 1973) is an American political operative and political commentator.
 He was a political commentator for One America News Network (OANN) and Fox News Channel (FNC) and a former political commentator for the Cable News Network (CNN), as well as a former campaign manager of Donald Trump's 2016 campaign for President of the United States from January 2015 to June 2016.