As an alliance, it was in power from 2002 and 2005 when it collapsed due to disagreements between members over a constitutional referendum.

In preparation of the 2002 elections, the National Alliance Party of Kenya (Formerly NAK now NAPK) allied itself with the Liberal Democratic Party (LDP) to form the National Alliance of Rainbow Coalition (NARC).

Consequently, the original NARC was left in the hands of its chairperson Charity Ngilu who also served as the minister of health.

On 5 October 2007, Ngilu announced her support for the Orange Democratic Movement and its presidential candidate, Raila Odinga, in the December 2007 general election;.

After briefly running her own campaign, Ngilu initially opted to support Raila Odinga for the presidency in 2013, signing a coalition agreement involving NARC, ODM, Wiper Democratic Movement and FORD–Kenya, before walking out at the last minute to join the Jubilee Alliance.