Cord leader Raila Odinga arrived in Koyonzo, Mumias in Kakamega County for voter sensitisation, Friday.
This follows various similar campaigns in Mombasa, Migori, Kilifi, Kisumu, Kisii, Meru, Nyamira and Meru counties.
Kakamega whose governor is ODM deputy party leader, Wycliffe Oparanya, has over 1 million people who are issued with national Identity cards but only 632,000 people are registered as voters.
"Each one of us has a role to play in ensuring maximum registration. Make sure every eligible person you know is registered to vote. It's the only way to choose change in August,'' Raila told Mumias residents.
He is expected in Bungoma and Busia counties this weekend.