Joschka Fisher, German Foreign Minister and a Green, is probably the most popular politician in the country. However he is currently under withering attack for a bungled visa program that he accepts responsibility for.
If he is forced to resign, the ruling coalition in Germany, which has the Green Party as a junior partner, could possibly collapse too.
It should be said that Fisher, while a hardcore lefist in his youth, would probably be called a Demo-Green here. He’s no radical anymore.