Membership crisis at CDU and SPD: AfD and The Left post major gains
Background & Context
Germany’s two traditional major parties, the center-right Christian Democratic Union (CDU) and the center-left Social Democratic Party (SPD), remain among the country’s largest parties by membership but have been shrinking over the long term. At the end of 2025, the CDU had 356,769 members, about 2% fewer than a year earlier, while the SPD fell by 2.4% to 348,451.
By contrast, The Left (Die Linke) and the right-wing Alternative for Germany (AfD) grew sharply. The Left increased from about 58,500 to more than 123,000 members in one year, a gain of roughly 110%.
The AfD rose from about 51,000 to just over 73,000, an increase of around 43%. More members can give a party additional campaign volunteers, stronger local networks, and greater mobilization capacity, but membership figures do not translate directly into votes or public support.
The CDU and SPD have also not declined in every single year; the CDU, for example, recorded a slight membership increase in 2024.
Article Profile
Dramatization
Moderate
6/10
The article uses occasional dramatizing wording but stays mostly factual.
Moralizing
Low
1/10
The presentation largely avoids moral judgments.
Sharpening
Moderate
5/10
The article sharpens individual aspects but keeps some nuance.
Objectivity
High
7/10
The article is largely factual and fact-oriented.
Review Transparency
We compared party membership figures at the end of 2024 and 2025, as well as longer-term trends. The strong gains for The Left and the AfD are documented by published membership figures: The Left more than doubled its membership within a year, while the AfD grew by about 43%.
The CDU and SPD each lost around 2% of their members in 2025. The phrase “membership crisis” is an editorial characterization of their longer-term decline and aging membership base; it does not mean that both parties lose members every single year.
Membership figures can affect a party’s organizational strength but are not a direct measure of electoral support.
Impact Check
Does it affect you?
60% impact
The membership decline at the CDU and SPD could impair their campaign capacity, since fewer members mean less mobilization.
Security risk?
10% impact
No direct security risk for Germany, since changes in party membership do not pose a threat.
Historic?
75% impact
Historically, there have been similar phases of membership shifts in German parties that changed political landscapes.
Why is this article's headline most likely true
The claim is true: the CDU and SPD lost members in 2025, while the AfD and especially The Left posted major gains. That description is supported by growth of roughly 43% for the AfD and more than 100% for The Left.
“Membership crisis,” however, is an editorial characterization of the CDU’s and SPD’s longer-term decline. Membership trends also do not show how many people will ultimately vote for a party or how successful it will be at the ballot box.
This analysis is based on a journalistic report by fr.de. The rating and context were produced with AI assistance.
AI Transparency
This analysis was produced, structured and editorially reviewed with AI-assisted systems. The rating refers to the specific statement examined and is based on the sources cited.
Methodology & AI Transparency