Nearly six months after his impeachment, former Deputy President Rigathi Gachagua has officially resigned from President William Ruto’s United Democratic Alliance (UDA) party.

The announcement, made on Monday through a public letter addressed to the party’s secretary-general and posted on Gachagua’s social media, marks a definitive break from the ruling coalition.

Gachagua, who was ousted from office on October 18, cited deep frustrations and disillusionment with the party he once championed.

He accused UDA of betraying its founding promises and steering Kenya in the wrong direction, describing the party as a “dangerous political experiment” that has failed Kenyans.

 “The party squandered a critical moment for Kenya to thrive economically, socially, and politically,” he wrote.

The former DP took direct aim at President Ruto, claiming he misled the public during the 2022 campaigns by presenting UDA as a party built on justice, freedom, peace, and prosperity. Gachagua now says those ideals were a "lie" and warned that no country can thrive on dishonesty.

He further condemned the Kenya Kwanza administration for implementing what he termed a “failed and corrupt” Competency-Based Curriculum (CBC) and a disorganized university funding model. Gachagua also criticized the government over recent reports of enforced disappearances and the suppression of dissent, calling the regime “rogue” and oppressive.

 “UDA has abandoned every Kenyan,” Gachagua declared.

Since his impeachment, Gachagua has aligned himself with a new opposition bloc featuring prominent political figures such as Martha Karua (People’s Liberation Party), Kalonzo Musyoka (Wiper Party), and Eugene Wamalwa (DAP-Kenya).

These leaders have pledged to unite in mobilizing Kenyans against the current administration and eventually back a single presidential candidate to challenge Ruto in the 2027 general elections.