박원순
The party hemorrhaged support as the factional conflict intensified, falling from around 40 to 30 percent in opinion polls. A survey conducted on 12–14 November showed that supporters of the party wanted Ahn and Seoul mayor Park Won-soon to assume the leadership alongside Moon. On 29 November, Ahn rejected a proposal from Moon to establish a joint leadership, and the next month he presented Moon with an ultimatum, demanding that he would call a convention to elect a new party leader. Moon rejected the demand, and Ahn left the party.