Former TNA secretary general Onyango Oloo led led Jubilee party officials from eight counties and joined the Cord coalition, Wednesday.
He accused the Jubilee government of presiding over corruption, saying the president Uhuru Kenyatta-led party, had been hijacked by people associated with deputy president William Ruto's URP, which was dissolved into Jubilee party.
According to the lawyer, the formation of Jubilee party on September 19, 2016, failed to address TNA's agendas, hence his departure.
He led a group of TNA officials and over 150 members from Jubilee to ODM, Wednesday, and later joined Cord leader Raila Odinga in Kisumu, to campaign for mass voter registration.
The exercise kicked off January 16 to February 14, 2017, ahead of August 8 polls.
Odinga welcomed him in the Opposition, and said Cord was still ready for more defectors.