The South Australian state election has claimed another high-profile Liberal scalp, with the ABC projecting former transport minister Corey Wingard has been defeated by Labor challenger Sarah Andrews.
Mr Wingard, who was first elected in 2014, won the seat of Gibson in Adelaide's southern suburbs in 2018 on a margin of 10 per cent.
Gibson was the site of a controversial rail crossing proposal at Hove, which was eventually scrapped after the preferred project option failed to secure support from the federal government.
Mr Wingard suffered a catastrophic swing of more than 13 per cent against him in the election.
The result in Gibson is another blow for the Liberals, who last night had electoral ignominy inflicted upon them by Labor and its leader Peter Malinauskas, losing a projected seven seats — six of them to the ALP, and one to an independent.
Mr Malinauskas will be sworn in as Premier, along with Susan Close as Deputy Premier and Stephen Mullighan as Treasurer, at Government House on Monday.
Incoming Labor MPs are set to include Lucy Hood in Adelaide, Nadia Clancy in Elder, Erin Thompson in Davenport, Rhiannon Pearce in King and Olivia Savvas in Newland.
Outgoing premier Steven Marshall earlier announced his intention to step down as Liberal leader, but that could prove a moot point if he fails to secure re-election.
Mr Marshall currently remains in a neck-and-neck race with Labor challenger Cressida O'Hanlon in the seat of Dunstan.
"The pre-polling and postal voting will determine that [outcome]."
Several other seats are currently too close to call.
"The seats remaining in doubt are mostly Liberal-held seats, so the new government has definitely got a majority," Green said.
They include Flinders, where Liberal candidate Sam Telfer — who succeeded retiring Liberal MP Peter Treloar — is marginally ahead of independent candidate and voluntary assisted dying advocate Liz Habermann.
Finniss, south of Adelaide, is also in doubt as independent candidate Lou Nicholson could unseat Primary Industries Minister David Basham.
"People are concerned about health.
"Down here … we do have an older population and they have a lot to offer."
Liberal MPs David Pisoni, Adrian Pederick, John Gardner and Josh Teague are all facing knife-edge battles to stay in power.
Either Labor's Catherine Hutchesson or independent Heather Holmes-Ross looks set to defeat Liberal candidate Alexander Hyde in Waite, previously held by Liberal-turned-independent Sam Duluk.
"There's been two different preference counts, one produces a win for Labor's Catherine Hutchesson, the other a win for independent for Heather Holmes-Ross."
While the election of a Labor government has been confirmed, the Legislative Council remains another key battleground.
Labor and the Liberals look set to each secure four seats, and the Greens will pick up the ninth of 11 seats on offer.
But one of the biggest surprises could see One Nation collecting one of the two remaining seats, with the other likely to go to Labor.
"On the current numbers it's likely that the Labor Party will win a fifth seat," Green said.
"It looks like the last seat could well go to One Nation, who are the highest polling of the smaller parties and that will deliver a change to the upper house."
