How German Chancellor Olaf Scholz became so unpopular

Despite poor approval ratings, German Chancellor Olaf Scholz is running again as the Social Democrats' top candidate in the 2025 federal election. Why did the German government become so unpopular during his tenure?

source https://www.dw.com/en/how-german-chancellor-olaf-scholz-became-so-unpopular/a-70795787?maca=en-rss-en-ger-1023-rdf