During a meeting of leaders of the Shekhar Koirala faction on Wednesday, Thapa claimed that the electoral alliance would end after the National Assembly election.
A total of 1,300 votes have been cast till 5:00 pm in the reelection that took place to elect the party president in its ongoing 14th General Convention.
He had decided to support Deuba as the party's chairman to create an atmosphere of consensus within the party after holding discussions with his constituents this morning.