The Election Result That Looked Strong Until You Examined the Math

Friedrich Merz’s CDU/CSU emerged from Germany’s February 23 snap election with approximately 28.6% of the vote, their strongest showing since 2013. On its face, this looks like a decisive mandate. In coalition mathematics, it reads more like a constrained victory. The party won seats but lost the comfortable arithmetic that typically greets center-right governments in postwar German politics. More consequential than their vote share was what happened to their right flank.

The Alternative for Germany finished second with roughly 20.8%, the party’s best-ever federal result. This matters less as a statement about AfD popularity than as a statement about the coalition Merz could actually form. Every major party has enforced a cordon sanitaire around the AfD. No coalition partner will work with them. So despite that commanding second-place finish, Merz faced a genuinely narrowed field of options. The Greens, traditional partners in center-right arrangements, became a political liability rather than an obvious choice.

So Merz reached for the SPD instead. The two parties signed a coalition agreement by April 2025, creating a government without Greens participation for the first time since 2005. To understand what this arrangement actually costs, you need to follow the money and the incentive structures hiding underneath the headline numbers. That’s where the story gets interesting.

The €500 Billion Question: When Fiscal Orthodoxy Meets Strategic Reality

In March 2025, barely a month into government, Merz’s coalition announced a €500 billion infrastructure and defense investment fund. This was not a routine budget proposal. Germany would bypass the long-standing constitutional debt brake to fund it. For anyone familiar with postwar German economic policy, that announcement should have landed like a thunderclap. The debt brake represents more than fiscal conservatism. It’s embedded in the German constitutional DNA, a direct response to Weimar inflation and Nazi deficit spending. German politicians invoke it the way American politicians invoke the Second Amendment.

Why would a center-right chancellor with Merz’s free-market credentials immediately blow through this constraint? Follow the incentive chain. Germany’s defense industrial base has been running below capacity for decades. The NATO commitment to spend 2% of GDP on defense suddenly became politically mandatory after 2022. German manufacturers cannot quickly expand capacity without public investment. France and the United States have already secured contracts that German firms want. The window for Germany to claim European defense market share is narrow and closing.

But there’s a second layer. The SPD holds the Finance Ministry in this coalition. An SPD finance minister can justify breaking the debt brake for infrastructure and social spending in ways a CDU finance minister cannot. This isn’t accidental. The coalition structure itself creates political permission for spending that would face fierce domestic criticism if the CDU held all economic portfolios. Merz gets his defense buildup and infrastructure investment. The SPD gets to share ownership of fiscal expansion. Both parties shield themselves from their respective bases by distributing blame and credit across the coalition.

This is not evidence of secret conspiracy. This is how modern German coalition governments actually function when neither party can govern alone. The financial commitments reflect genuine strategic necessity. They also reflect the political economy of coalition formation in a fragmented parliament.

Migration as Economic Argument, Not Just Cultural Debate

According to Politico Europe: German Government Tracker, CDU/CSU approval ratings hovered near 30% through late 2025 as migration policy dominated domestic debate. The standard interpretation is obvious: voters care about immigration, so governments respond. The actual story involves money and labor markets in ways the headline polling obscures.

Germany faces a specific demographic crisis. The working-age population will shrink significantly over the next two decades. Pension systems depend on current workers supporting current retirees. Manufacturing depends on filling skilled positions that German schools are not producing in adequate numbers. These are not political controversies. They’re actuarial facts. Germany simultaneously needs worker immigration to sustain pensions and maintain industrial capacity, while also facing genuine social integration challenges in communities that absorbed large refugee populations during 2015-2016.

Merz’s migration emphasis addresses both problems through policy design rather than pretending the tension doesn’t exist. Stricter asylum processing combined with targeted skilled worker admission serves both the political demand for border control and the economic demand for labor supply. This is why migration policy consumed so much political energy in his first hundred days. It’s not distracting from economics. It is economics, dressed in different language.

The SPD’s participation in this coalition meant accepting migration policies more restrictive than the party traditionally favored. In exchange, the party got infrastructure investment and what it could frame as continued social spending. That’s the deal. Again, this reflects actual incentive structures rather than backroom scheming. The SPD controls enough parliamentary seats that it could have blocked many Merz priorities. It chose coalition membership over opposition because the party’s own voters increasingly demand both fiscal investment and migration management.

What Merz’s Chancellorship Reveals About European Center-Right Realignment

The broader European picture matters here. Center-right parties across the continent face similar pressures. They need to maintain upper-middle-class fiscal discipline while addressing working-class economic anxiety. They need to manage NATO commitments and EU obligations while responding to nationalist sentiment. They need to accept climate transition requirements while avoiding industrial disruption that threatens employment.

Traditional center-right coalition partners have fragmented under this pressure. Conservative parties increasingly find they cannot work comfortably with Greens on climate policy, or with social democrats on spending priorities, or with business-oriented liberals on anything requiring public investment. Meanwhile, far-right parties have captured protest votes without having to deliver on any of these contradictions, because they remain outside government. The AfD’s 20.8% vote share reflects real voter frustration. It doesn’t require the AfD to have actually solved anything.

Merz’s choice to govern with the SPD rather than the Greens signals something worth paying attention to regarding where European center-right politics is moving. Climate issues remain technically urgent but politically secondary. Labor market management, defense spending, and fiscal sustainability dominate coalition negotiations. The SPD can deliver on all three. The Greens cannot credibly partner on defense expansion. The Free Democrats, once natural CDU/CSU partners, were eliminated from parliament entirely.

Check the Federal Returning Officer: 2025 German Election Results for the full arithmetic. The mathematical constraints visible in those numbers will shape European center-right politics for years. When you cannot build majorities without including social democrats, the entire character of center-right governance changes. You become more economically expansionist than classical conservatives prefer. You accept more state spending and broader tax burden distribution. The entire political equilibrium shifts rightward on culture and identity while shifting leftward on economics.

Why This Matters Beyond Germany’s Borders

German coalition structures influence the European project itself. Germany’s commitment to the €500 billion defense fund signals something about NATO burden-sharing expectations. The willingness to suspend the debt brake suggests that European governments will accept more fiscal expansion than the euro crisis orthodoxy of 2010-2015 permitted. The migration focus indicates that European center-right parties believe they can capture restrictionist sentiment while still managing labor demand.

None of this guarantees success. Approval ratings remaining near 30% suggest that Merz’s coalition has satisfied neither its own base nor the broader electorate. The spending commitments create future fiscal pressures. Migration policy concessions may alienate SPD voters without fully convincing CDU/CSU voters that the party has addressed their concerns. The coalition could collapse before its natural term. But the initial choices reveal genuine political and economic constraints that define what center-right governance looks like in 2025.

What aspect of this coalition arrangement strikes you as most significant? Does the SPD-CDU/CSU partnership represent a durable new model for German governance, or are we watching a temporary crisis arrangement that will collapse under its own contradictions? The next budget cycle and the next migration surge will provide concrete answers.