Robert Woonton in the context of "Democratic Party (Cook Islands)"

The 2005 Manihiki by-election was a by-election in the Cook Islands electorate of Manihiki. It was held on 8 February 2005, shortly after the 2004 general election, and was precipitated by an electoral petition finding the result in the seat to be a dead tie. Both parties to the petition, Prime Minister Robert Woonton and Cook Islands Party leader Henry Puna had agreed that in the event of a draw the question should be decided by the voters, and so Woonton resigned. As a result, Jim Marurai became prime minister.

Woonton subsequently decided not to contest the election for personal reasons. The election was won by Henry Puna.

General elections were held in the Cook Islands on 7 September 2004. Initial results showed the Democratic Party winning by a wide margin, but close results led to 11 electoral petitions being filed, delaying the date Parliament could sit until mid-December. In the interim, Prime Minister Robert Woonton announced that he was forming a coalition government with the rival Cook Islands Party. This led to a split within the Democrats, with Woonton and four other MPs leaving to form the Demo Tumu Party. With 14 MPs, the coalition had a comfortable majority in Parliament.

The results of the electoral petitions saw the seat of Titikaveka change hands while Woonton's seat was a dead tie. Woonton subsequently resigned in order to fight a by-election, causing his government to be dissolved. He was succeeded by his deputy, Jim Marurai.