Mr. Prince appears increasingly likely to challenge John Barrasso, a senior member of the Senate Republican leadership, according to people who have spoken to him in recent days. He has been urged to run next year by Stephen K. Bannon, who is leading the effort to shake up the Republican leadership with financial backing from the New York hedge fund billionaire Robert Mercer and his daughter Rebekah.
.. While his ties to Wyoming are thin, the state is attractive to Mr. Prince because it has none of the personal political entanglements he would face in his home state of Michigan. Public records show that Mr. Prince, a former member of the Navy SEALs who has lived all over the world, had an address in Wapiti, Wyo., in the state’s northwest corner, for several years in the late 1990s and early 2000s.
.. For months this year, Mr. Prince — with Mr. Bannon’s support — pushed a plan to replace soldiers with contractors in Afghanistan. The proposal, which would have radically changed the way the fight in that country is conducted, was vehemently opposed by the national security adviser, Lt. Gen. H. R. McMaster, and the defense secretary, Jim Mattis.
.. Mr. Bannon is expected to throw his support behind Chris McDaniel, a conservative state senator from Mississippi who is considering a primary challenge to United States Senator Roger Wicker, who has served since 2007 and is close to Republican leaders.
.. Mr. Bannon is also hoping to persuade Ann LePage, the wife of Maines outspoken governor, Paul LePage, to run for the Republican nomination to challenge Senator Angus King, an independent who is up for re-election in 2018.