"Mukhtar Ansari will not be welcome in the party. We don't want such people in the party," Yadav said during a television show, adding he didn't take the decision regarding the merger.
Yadav's displeasure over the merger had been evident soon after the development on 21 June when he said, "If party workers perform their responsibilities, then there will be no need of another party."
Hours later, he sacked the Secondary Education Minister Balram Yadav apparently for facilitating the merger.
The Chief Minister, however, later described the merger as an "internal matter" of the party and said he had no displeasure over it.