Migori Governor Zachary Obado has signaled plans to decamp ODM and vie for president in 2022.
Mr Obado, who was elected on ODM in 2017, has had a frosty relationship with the party, and its leader Raila Odinga.
He now says he will form a party or revamp People's Democratic Party, which he used to vie in 2013. He said he would vie for presidency and urged Migori residents to back him.
Without mentioning names, Obado said "someone cheated" Raila, later changed tack and formed a new political outfit - One Kenya Alliance.
The party brings together ANC leader Musalia Mudavadi, Wiper's Kalonzo Musyoka, Ford-Kenya's Moses Wetang'ula and Kanu chair Gideon Moi.
READ MORE
Oburu urges political leaders to rise above partisan politics
Death rumours made me stronger, says ODM leader Oburu
Out of the frying pan into the fire
Western Kenya leaders rally behind Oparanya for Ruto's deputy president slot
Political analysts believe the new outfit is backed by President Uhuru Kenyatta. Obado claimed without Raila in the new political formation, the Luo community would be sidelined.
Anne Atieno