“Hillary and Clinton,” a Broadway play that explores the relationship of a political power couple, will close on Sunday, four weeks earlier than scheduled. The play, by Lucas Hnath, stars Laurie Metcalf and John Lithgow and is directed by Joe Mantello. It opened in April; at the time of its closing it will have played 37 previews and 77 regular performances at the John Golden Theater. Set a hotel room in New Hampshire in 2008, the play imagines an interaction between Hillary Clinton and Bill Clinton — not the real ones, but characters with the same names in an alternate...