 This is not only due to South Australia's status as Australia's most centralised state (some three-quarters of the population lives in Adelaide), but because the SA Liberals have built up healthy support bases in rural areas that would tilt National in the rest of the country.The SA Nationals have never been part of a formal Coalition with the Liberals, unlike their counterparts in most of the rest of Australia.However, had the SA Nationals won any federal seats in 2013, they would have been part of the Coalition.