The polls have opened in South Australia’s state election with Liberal Premier Steven Marshall bidding for a second term and opposition leader Peter Malinauskas seeking to return Labor to power. Close to one million people will vote on Saturday while about 300,000 have cast an early ballot or applied for a postal vote. They could be crucial to the outcome along with six independents who could help one of the major parties form government if the result is a hung parliament. Recent opinion polls have Labor in a commanding position and while the opposition needs just a two percent swing to pick up the necessary five seats, it remains unclear if it will come in the right places, a string of marginal seats held by the government. Malinauskas has focused heavily on health throughout the campaign, promising to spend big to fix an ailing system plagued by ambulance ramping and overloaded …