Koimburi announced his decision on Wednesday while addressing journalists in Juja, ending weeks of speculation over his political future.
The outspoken legislator said his exit from DCP was informed by what he described as betrayal, internal sabotage, and lack of goodwill within the party’s leadership.
According to Koimburi, his fallout with DCP stems from disagreements over local politics in Juja, where he claims party leaders failed to protect him from political attacks orchestrated by rivals within his own backyard.
He accused the party of prioritising personal interests over loyalty and grassroots support.
The Juja MP said he had been a committed supporter of Gachagua, going to great lengths to defend him politically.
However, he noted that his trust was shattered after he allegedly discovered that forces within the party were working against his re-election prospects.
Koimburi claimed that his political opponents in Juja had received backing from individuals closely linked to the DCP leadership, a move he said made it impossible for him to continue operating within the party. He added that the experience had left him disillusioned with the party’s internal culture.
In a sharp warning to other politicians considering joining DCP, Koimburi urged them to exercise caution, arguing that the party was not a safe political home for leaders seeking long-term growth.
He said the internal environment within the party was unpredictable and hostile to dissenting voices.
Following his defection, Koimburi said he would now work closely with the Kenya Kwanza administration to advance development projects in Juja constituency.
Following his defection, Koimburi said he would now work closely with the Kenya Kwanza administration to advance development projects in Juja constituency.
He expressed confidence that aligning himself with the government would help unlock stalled initiatives that have remained incomplete for years.
The MP said his priority would be engaging national government offices, including State House, to push for the completion of key infrastructure projects.
The MP said his priority would be engaging national government offices, including State House, to push for the completion of key infrastructure projects.
He cited roads, electricity connectivity, and other public works as among the areas he expects to receive renewed attention under the Kenya Kwanza leadership.
Among the projects he highlighted were the Witeithie–Maraba road and the Kimbo–Matangi road, which he said are critical to economic activity and mobility within the constituency.
Among the projects he highlighted were the Witeithie–Maraba road and the Kimbo–Matangi road, which he said are critical to economic activity and mobility within the constituency.
Koimburi argued that Juja residents deserve tangible development rather than endless political disputes.
Koimburi’s move comes as political temperatures rise ahead of the 2027 General Election, with parties intensifying efforts to consolidate support in vote-rich regions such as Kiambu County.
Koimburi’s move comes as political temperatures rise ahead of the 2027 General Election, with parties intensifying efforts to consolidate support in vote-rich regions such as Kiambu County.
The MP is seeking re-election for a second term and faces a competitive field of challengers.
One of his main rivals is Aloise Kinyanjui, brother to former Trade Cabinet Secretary Moses Kuria, who has already aligned himself with Gachagua’s DCP.
One of his main rivals is Aloise Kinyanjui, brother to former Trade Cabinet Secretary Moses Kuria, who has already aligned himself with Gachagua’s DCP.
Kinyanjui has been actively campaigning alongside the DCP leader and has publicly pledged loyalty to the party.
Another potential challenger is Godfrey Mucheke, the Majority Leader of the Kiambu County Assembly, who also commands a significant political base in the area.
Another potential challenger is Godfrey Mucheke, the Majority Leader of the Kiambu County Assembly, who also commands a significant political base in the area.
