The series stars Jeff Daniels and Emily Mortimer as the anchor and producer of a struggling cable news programme.
Sorkin, who serves as showrunner on The Newsroom, received some criticism on the show's debut for his usual quick dialogue.
Despite the mixed critical reception, The Newsroom has been renewed for a second season, with all major players including Allison Pill and Dev Patel expected to return.
It has now been announced that the Social Network scribe has decided to replace most of his writing staff, with sources claiming that amongst those returning for season two is writer Corinne Kinsbury, Sorkin's ex-girlfriend.
HBO has released a statement via The Hollywood Reporter saying: "Every year each show reassesses the needs of its writing staff. This process is nothing out of the ordinary."
The Newsroom continues to air Sundays on HBO in the US. The show airs on Sky Atlantic in the UK.
Watch a trailer for The Newsroom below: