Former advisor of Raila Odinga has challenged some of his competitors in Nairobi gubernatorial race saying they are not sufficiently educated to hold the office.

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Speaking on Wednesday at JKL Show on Wednesday, Miguna said that senator Sonko cannot communicate fluently in English and his Bachelor's degree was bought.

"Sonko cannot construct one full sentence in English. His English is broken and his Swahili is mixed with Sheng. He cannot speak to Canadian Governor, maybe with the help of an interpreter," said Miguna.

He also said that Sakaja's degree in Acturial Science is not valid saying that he was just a PNU driver and Uhuru Kenyatta's personal assistant with his degree.

"Someone with a degree in acturial science cannot be anyone's PA, or a driver as Sakaja was formerly," added Miguna.

The Nairobi gubernatorial race has attracted the most aspirants including the incumbent Evans Kidero, Senator Gedion Mbuvi, Dagoretti South MP Denis Waweru, nominated MP Johnson Sakaja, Miguna Miguna and Bishop Margret Wanjiru.