The nationalist Cook Islands Party, led by the Prime Minister, Henry Puna, attempted to win a third consecutive term in government. However, the elections resulted in a hung parliament, with the opposition Democratic Party led by Tina Browne becoming the largest party, although Browne failed to win a seat, losing in Rakahanga constituency.
The Democratic Party won 11 seats, the Cook Islands Party 10 seats, One Cook Islands Movement one seat, with independent candidates winning two seats.[3] Following the election, the Cook Islands Party joined forces with the independents and One Cook Islands to retain power.[4]
Although the Democratic Party won the most seats, neither leader Tina Browne nor Deputy Leader James Beer were elected to Parliament. The constitution of the Cook Islands requires the Prime Minister to be a member of parliament.[8]
On 7 July the Cook Islands party formed an alliance with independent MPs Rose Toki-Brown and Robert Tapaitau, and One Cook Islands movement's George Maggie to retain power.[9] Toki-Brown, Tapaitau and Maggie were all appointed to Cabinet, replacing Ministers who had lost their seats.
Six electoral petitions were filed, challenging the results in Rakahanga, Murienua, Pukapuka-Nassau, Avatiu-Ruatonga-Palmerston, Ngatangiia, and Mauke.[10] However, all of these petitions were rejected, confirming the result of the election.[11] Rakahanga MP Toka Hagai resigned on 1 November 2018 after allegations of treating.[12] In December 2018 the Court of Appeal ruled that Tina Browne had won the seat.[13]