Machakos Senator Johnston Muthama has slammed President Uhuru Kenyatta for being a beneficiary of a flawed poll. [Photo/kenyalife.com]A National Super Alliance (Nasa) senator has scoffed at President Uhuru Kenyatta's bid for re-election saying he can never win in a free and fair contest.

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Machakos Senator Johnston Muthama Tuesday lampooned President Kenyatta terming him a beneficiary of a flawed electoral process in the country.The outspoken senator dared Uhuru to a credible and fair contest with Nasa presidential contender Raila Odinga come August 8."Uhuru Kenyatta is simply a beneficiary of flawed elections. He cannot win in a fair contest and we will prove that to him on August 8 when Raila beats him," he said.

Uhuru was declared the duly elected president in 2013 following a Supreme Court ruling that dismissed an appeal by Odinga challenging his victory.

Muthama added that Nasa will go on with its Adopt a polling station strategy despite opposition from acting Interior CS Fred Matiangi.He was speaking during a political rally in Laare in Tharaka Nithi county.

Among those in attendance included Mr Odinga, Ford Kenya party leader Moses Wetangula and his Amani Coalition counterpart Musalia Mudavadi among a host of other local politicians.