Turkey's Istanbul opposition breakthrough

Istanbul ballots and the struggle over elected office

Istanbul's opposition breakthrough exposed how election authorities, courts and prosecutors could become decisive participants in Turkey's political contest. Ekrem İmamoğlu's victory in 2019 deprived President Recep Tayyip Erdoğan's political movement of municipal control in a city it had governed for roughly a quarter-century. The result was not a national change of government, but it gave the Republican People's Party (CHP) control of a city with enormous financial, administrative and symbolic weight. The ensuing disputes connect political competition to the institutional conditions under which the winners can actually exercise power.

On 31 March 2019 İmamoğlu narrowly defeated the governing AKP candidate, former prime minister Binali Yıldırım. The initial advantage was roughly 13,000 votes. On 6 May the Supreme Election Council annulled the mayoral vote, citing procedural irregularities, and ordered a rerun for 23 June. In that contest İmamoğlu won 54.21 percent to Yıldırım's 44.99 percent; turnout was 84.44 percent, according to the Centre for Eastern Studies. His margin expanded to more than 775,000 votes. Yıldırım and Erdoğan acknowledged the outcome. The rerun therefore produced a clearer electorate verdict than the first poll, making a second annulment politically costly.

On 14 December 2022 an Istanbul court sentenced İmamoğlu to two years, seven months and fifteen days over a statement attacking the electoral body's decision to cancel the original vote. The sentence and political ban were subject to appeal. Human Rights Watch criticised that prosecution as interference with speech and the right to political representation. On 31 March 2024 voters re-elected İmamoğlu to the municipality. The CHP also led nationally in local-election votes, winning 37.8 percent, according to Human Rights Watch's later chronology. The results demonstrated that organised opposition could win significant offices despite uneven access to the institutions of electoral integrity and competitiveness.

On 19 March 2025 Turkish authorities detained İmamoğlu with more than a hundred other officials and politicians in investigations launched by prosecutors. On 23 March a court ordered his pretrial detention. Human Rights Watch characterised the action as politically motivated, while prosecutors alleged corruption. In March 2026 the watchdog said the prosecution had expanded to a mass case involving 407 defendants and that İmamoğlu remained in detention. These allegations and criticisms must be attributed to their respective institutional speakers rather than collapsed into an unqualified criminal finding.

The 2019 annulment and the 2025 detention were separated by six years, repeated ballots, court decisions and sustained opposition mobilisation. They nevertheless produced a common question: can a mayor retain political authority after winning at the ballot box if national-level institutions retain power to interrupt the mandate? A concentration of executive influence increases the importance of independent courts. The repeated successes of opposition candidates meanwhile show meaningful electoral capacity and elements of democratic resilience. Istanbul therefore supplies evidence for both political contestation and the institutional vulnerability of a successful opposition.