EU Enlargement Polling: Ukraine Candidacy, Western Balkans & Frozen Talks

EU enlargement — the process by which countries outside the EU join through the accession process — has been the bloc's most powerful geopolitical tool since the 1990s. The so-called "big bang" enlargement of 2004-2007, which brought in 12 Central and Eastern European countries, transformed both the EU and those countries in ways almost universally regarded as positive: faster economic growth, stronger democratic institutions, higher living standards. But the experience of the Western Balkans — where accession has been dangled since the early 2000s without result — has exposed the limits of enlargement as a policy tool when the EU is internally divided or when candidate countries fail to implement required reforms.

Ukraine's candidacy, granted in June 2022 in the immediate aftermath of Russia's full-scale invasion, represents the most politically charged enlargement decision in EU history. Ukraine is by far the largest country ever to enter the EU accession process: pre-war population of 44 million, enormous agricultural sector, a war-devastated economy requiring an estimated €400 billion in reconstruction, and a front-line conflict with Russia that shows no sign of resolution. Its membership would transform EU institutions — requiring treaty changes, reform of voting weights, and a fundamental restructuring of the Common Agricultural Policy to accommodate Ukrainian farmers. Negotiations opened in June 2024, but even the EU Commission's most optimistic internal scenarios place Ukrainian accession in the early 2030s at the earliest.

The Western Balkans remain the EU's most frustrating enlargement story. Montenegro is the most advanced candidate after 15 years of negotiations, but even it has not closed all 33 required negotiating chapters. Serbia's accession has effectively stalled over its refusal to impose sanctions on Russia following the 2022 invasion and its ongoing refusal to recognize Kosovo's independence. Bosnia and Herzegovina is beset by a dysfunctional political system deliberately designed to prevent effective governance — Republika Srpska leader Milorad Dodik has openly threatened secession and been sanctioned by the US. Georgia's candidacy was effectively suspended in 2024 after the Georgian Dream government (widely seen as Moscow-aligned) violently suppressed pro-EU protests following a disputed election.