A by-election was held in the Cook Islands constituency of Vaipae-Tautu on 31 March 2015.
In the July 2014 general election, the contest for the Vaipae-Tautu seat had been won by Cook Islands Party candidate Mona Ioane, who went on to serve as Education Minister in Prime Minister Henry Puna's government.
If they won the seat, the Democrats "could assume power in coalition with the One Cook Islands Movement" (OCIM).
[1] But Democratic Party candidate's Kete Ioane's sudden death on 13 February led to a postponement.
[2][3] At the start of March, the One Cook Islands Movement reversed its decision not to stand against the Democrats, and announced Amiria Davey as its candidate.