Mohammed Hayatudeen, who also contested in the primary election, polled 177,120.
He said the results were fraudulent and concocted.
Mr Hayatu-Deen said, “I am concerned by reports from across the country of widespread vote rigging.”
The Zamfara chapter of the African Democratic Congress has declared former Vice-President Atiku Abubakar as the winner of its presidential primary election in the state.
The returning officer said a total of 69,434 votes were cast during the primary.
Mr Dankama described Mr Atiku as an experienced and competent leader capable of rescuing Nigeria from socio-economic and security challenges.
The primary election is scheduled for May 25.
He said that every Nigerian should be allowed to function freely without discrimination.
“The issue is that, at all times that he has passed primaries, he has not won elections,” he said.
Me Amaechi is now the second ADC presidential aspirant after Mohammed Hayatu-Deen.
