The survey showed that Erdogan had the potential to attract the backing of 40 percent of the electorate, Ozer Sencar, the head of MetroPoll, said in a Twitter post on Thursday.
Meral Aksener, the leader of the centre-right opposition Good Party (İP), topped a list of possible candidates with 49.9 percent support, followed by Kemal Kilicdaroglu, the head of the main opposition Republican People’s Party (CHP) with 49.2 percent, the survey showed.
Erdogan and his ruling Justice and Development Party (AKP) must hold presidential and parliamentary elections by June next year.
The Turkish president’s approval rating has been in decline due to economic troubles in the country -- the lira slumped by 44 percent against the dollar last year. Annual inflation surged to 78.6 percent in June, the highest level since 1998, pummelling living standards.
Erdogan may glean the support of 46.4 percent of the electorate when undecided voters were included in calculations, the survey showed. In such a case, Akşener would gain the vote of 55 percent of the electorate, while Kilicdaroglu would score 51,4 percent.
The proportion of the electorate who said they would definitely not vote for Erdogan stood at 42 percent, according to the survey.
Six opposition parties, including the CHP and İP, have teamed up to abolish a presidential system of government in Turkey that granted vast executive powers to Erdogan in 2018. They are also working on putting forward a joint candidate to run against Erdogan at the elections.
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