Here is the best article I could find on this.
The Greens' surge in popularity comes after the party on Monday named co-chair Annalena Baerbock, 40, as its first candidate for chancellor. The nomination of Ms Baerbock, a centrist who advocates a greener economy and a tougher foreign policy stance on Russia and China, has been widely praised.
Hopefully the Christian Democrat Union won't be on top any more.
It's a coalition, kind of like if the DSA was an actual party. They did expel the DKP (the West German version of the SED) in 2008, which is a shame, but Communist and other revolutionary elements, some of which descend from the SED, are strong factions.
Yeah that was because Christel Wegner made whack statements about the Stasi, no way they could not distance themselves from that.