Hope Hicks, the White House communications director and one of President Trump’s longest-serving advisers, is to step down, the administration says.

The 29-year-old former model and ex-Trump Organization employee has been by Mr Trump’s side for years.

She is reported to have told colleagues she felt she had accomplished all she could in the White House.

She is the fourth person to serve as White House communications chief.

White House spokeswoman Sarah Sanders said it remained unclear when Ms Hicks would leave the administration.

She said her resignation was not connected to testimony she gave to the House Intelligence Committee on Tuesday.