Isiolo Governor Godana Doyo has confirmed that he will not participate in Friday's Jubilee nominations as he has decamped to Party of Development and Reforms (PDR).
Mr Doyo said his new party is Jubilee 'friendly'.
The governor said more than five other aspirants in Isiolo, who were to vie under the Jubilee Party ticket have also moved to PDR.
The governor said he decided to jump ship due to concerns over Jubilee party structures and transparency, especially at the county level during the primaries.
"I was concerned over mechanisms put in place to manage party affairs, especially in Isiolo County," he told the Nation in an interview.
The governor, who is set to defend his seat against six other aspirants said he was not comfortable with the fact that sitting governors were also subjected to the nominations.
"We (Jubilee governors) had suggested that it was not fair to treat the incumbents the same way as other aspirants who are not busy managing the affairs of the counties," added Mr Doyo.
The governor said he made the decision after consulting his supporters and said he supports President Uhuru Kenyatta's re-election in the August 8 polls.
"We have witnessed a total confusion as we head towards nominations in the county with other aspirants finding alternative parties because they fear that proper mechanisms have not been put in place to offer credible nominations as promised," said Mr Doyo.
Governor Doyo was to battle it out with two other top giants during JP nominations including Isiolo Senator Mohammed Kuti and former Tana and Athi River Development Authority Chairman Abdul Bahari.
Mr Doyo ascended to his seat on a URP ticket in the 2013 elections.