"It's been a great eight years at TV3 but I'm really excited about a change and a new challenge," she told The Diary.
It's not the first time a journalist has gone to the dark side. The Prime Minister's press secretary, Sia Aston, is a former TV3 reporter.
Opposition leader Andrew Little recently recruited a new chief press sec from the fourth estate - Sarah Stuart, a former Herald columnist and magazine editor.
Lucy Bennett recently left APNZ and moved to Wellington to take up the reins as Sam Lotu-Iiga's right-hand woman. And former Radio NZ journalist Nicola Grigg took up a job at Simon Bridges' office.
Morton is not the only female journalist leaving 3 News. Rebecca Wright is moving to the TVNZ newsroom, and Jane Luscombe is taking on a role at the Retirement Commission.
Back the boys - wear the appropriate T-shirt
New Zealand's greatest living ginger Martin Guptill will take to the field tomorrow at the MCG carrying the hopes of a whole nation. Can he smash another double century? Should we send our good vibes by wearing a tee in his honour?
Mr Vintage has produced a range of T-shirts in support of New Zealand.
There's the "Hairy Javelin" top for Grant Elliott fans. The "Steady the Ship" singlet for Kane Williamson devotees. The "B-Mac Attack" for supporters of the skipper. And the "Greatest Living Ginger" shirt for Guppy fans.
His wife, Laura McGoldrick, a Sky Sports broadcaster and face of The Cricket Show, has already snapped one up.
Trouble in paradise
Which high-profile Kiwis are having trouble on the married mid-life crisis front? She has undergone so much plastic surgery that her face is barely recognisable.
He had an affair with a pretty 32-year-old in his employ, who is no longer a staff member since the dalliance became known. Who said domestic life was bliss, eh?