Ince’s withdrawal gives the opposition a possible boost as it seeks to unseat President Erdogan.

According to polling data released by KONDA, Ince’s share of the vote stood at 2.2 percent in its most recent survey, the last before Sunday’s presidential and parliamentary elections.

Kilicdaroglu led the poll with 49.3 percent, followed by Erdogan at 43.7 percent. A fourth challenger, Sinan Ogan, stood at 4.8 percent in research conducted on May 6 and 7. KONDA, one of Turkey’s more respected polling firms, questioned 3,480 people in 35 of Turkey’s 81 provinces.