Sunday's state elections in Berlin and Mecklenburg-West Pomerania — a coastal state in Germany's north-east — are shaping up as a critical test of Chancellor Friedrich Merz's grip on power, just 16 months into his tenure. Polls in Berlin show an unusually tight four-way race, with the left-wing Die Linke (The Left) and the centre-right Christian Democratic Union (CDU) virtually tied at around 20–23%, followed closely by the far-right Alternative for Germany (AfD) and the Greens. The AfD is expected to roughly double its previous result to around 18%, a surge that has rattled established parties and intensified national debate over Merz's leadership.

The Berlin contest carries symbolic as well as political weight. Die Linke's candidate, Elif Eralp, could become the first mayor of Berlin with a Turkish-German background — a prospect her party sees as a direct counterpoint to the AfD's hardline anti-immigration platform. A left-wing coalition of Die Linke, the Greens and the centre-left SPD is considered the most likely alternative to the incumbent CDU-led city government of Stefan Evers, whose administration has faced sharp criticism over unfulfilled promises on housing and education. The CDU's previous candidate, Kai Wegner, drew ridicule after reportedly playing tennis while parts of the city suffered a blackout during a cold snap following an attack on energy infrastructure.

While migration dominates the national discourse, residents of Berlin — a city where 41.7% of inhabitants have a migrant background — say their most pressing concern is housing. More than 80% of Berliners rent their homes, and average rents have risen 69% since 2016 against a backdrop of relatively low wages and unemployment running at 10.6%. Die Linke, whose roots lie partly in East Germany's post-communist party, has made housing its central issue, advocating the forced transfer of properties held by large landlords such as Deutsche Wohnen — which owns over 100,000 apartments in Berlin alone — into public hands, in line with a 2021 referendum. Berlin's population has grown by nearly half a million since 2011 to 3.9 million, straining infrastructure and housing stock already burdened by €69 billion in public debt.

In the eastern district of Marzahn-Hellersdorf, where the AfD won 19.2% in the last state election and polling now suggests it could reach 36%, voters describe a mix of anxieties. Concerns range from the cost of living and the shortage of school places to broader unease about immigration, even in a neighbourhood where the foreign-born population is relatively low. Political analysts note that AfD voters are strongly mobilised by national issues and migration, and that the mainstream parties' failure to address economic insecurity has opened the door to the far right across both western and eastern parts of the city.

The results will reverberate well beyond Berlin. Eight CDU state premiers this week published a joint letter urging stability and backing Merz, while Bavaria's CSU leader Markus Söder also expressed support — moves widely read as attempts to pre-empt post-election calls for a leadership change. A poor CDU performance, particularly if the party loses its position in Berlin's government, is expected to intensify internal pressure on Merz, whose personal approval rating stands at just 14% in recent polling. CDU officials have already scheduled a coordination meeting for Sunday evening. Whether the results produce a "Kanzlertausch" — a chancellor swap — remains unlikely in the near term, but the elections will set the political temperature for a party navigating one of the most turbulent stretches in recent German history.