박원순
Ahn's polling was higher than other potential candidates, at 35% with second place coming in at 17%. His approval rating was subsequently polled afterwards, reaching over 50%. Ahn eventually didn't run despite his positive poll ratings instead endorsing Park Won-soon who went on to win the by-election. Park's win has been attributed to Ahn's endorsement due to centrist voters moving to Park's side after the endorsement.