Mr Yamin was widely tipped to win the election owning to his position as the former Ashanti regional secretary of the NDC, Deputy Ashanti regional minister and Deputy Youth and Sports Minister.
Before voting started, he was reported to have stormed Twebeboah Kodua Senior High School, where the party is holding its regional executive elections, with macho men.
His action is said to have drawn sharp disapproval from the delegates who hooted and made fun of him.
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Later, it emerged that the macho men, who known in the party as The Hawks, halted the election because they believe he was being handed a raw deal.
But calm was restored after NDC’s General Secretary Johnson Asiedu Nketia, who is supervising the polls, talked to the feuding groups.
Mr Yamin is also reported to have calmed down the vigilante group, who were reported to have overpowered the police.