Enderronian federal election, 1990

A federal election was held in Enderron on Saturday 15 September 1990 to elect the 140 members of the 12th Enderronian Parliament.

The incumbent United Party government, led by Prime Minister Mike Behrens, was seeking a second term. It was heavily defeated by the opposition Social Democratic Party, led by Helen Vandenberg.

The election was largely fought on the record of the United–Conservative coalition government, and its platform of deregulation, privatisation and free trade. The United and Conservative parties campaigned separately after no consensus was reached about continuing the coalition agreement following the election.

Although Behrens' personal popularity remained high, the United Party had become deeply unpopular by the time of the election, and many of its efforts to privatise and deregulate parts of the economy were seen as too radical. It also continued to leak support to the Conservatives. The opposition focused on the coalition's internal disputes and lack of unity. The Social Democrats, under leader Helen Vandenberg, had been well ahead in the polls for most of 1990, and were seen as the favourites to win the election.

The Social Democrats ended up winning 38.6 percent of the vote and 72 seats, a majority of three. The centre-right vote was split between the United Party with 21.7 percent and the Conservative Party with 17.6 percent.

To date, this is the last time that a sitting government at the federal level has been defeated after a single term, and the first occurrence since 1930. It is also the only election in which the Social Democrats won more than one seat in modern-day Flinders (that is, excluding Avalon), and the earliest election in which both major party leaders are still living.

Results
Independents: Jack Berg