The conservative CSU is a regional Bavarian party, which plays an important role on the federal level as "sister party" to chancellor Angela Merkel's CDU.
The CSU traditionally has a comfortable majority of around 50 percent in Bavaria. The average age of its 147,000 members is 59, they live mainly in rural areas. CSU leaders are known for their beer-swilling populism, they embrace conservative family policies for stay-at-home moms and anti gay marriage; some are euroskeptic, and the party leadership wants foreigner drivers to pay to use German motorways. This page provides a collection of DW's content the CSU.
The German state of Bavaria held regional elections last weekend. Everybody expected the ruling CSU (Christian Social Union) to lose the absolute majority it's been used to. And it did. Keith Walker speaks with DW political correspondent Thomas Sparrow and starts by asking him why a local election in Bavaria is so important for German national politics.
Bavaria's former premier, Edmund Stoiber, has said the CSU is a victim of its own success after the party fell to a new low in the polls. Sunday's vote in Bavaria will likely see the CSU lose its parliamentary majority.
Polls suggest the conservative Christian Social Union (CSU) in the southern state of Bavaria could garner a historic low result in upcoming state elections. The CSU currently rules with an absolute majority, but it's been losing support to the right-wing Alternative for Germany (AfD) party. For more, Inside Europe talks to DW's Berlin correspondent Daniel Pelz.