Former Guardian columnist Michael Wolff has accused the paper of losing its objectivity on the Edward Snowden story and losing interest in its United States operation.

Wolff was recruited as a weekly columnist for Guardian US in 2012. At the time Guardian US editor Janine Gibson praised his “unparalleled knowledge of big media”.

Wolff’s Guardian column was axed in April, and in the latest issue of GQ he wrote an in-depth report on his former employer.