Claim: Cem Özdemir, Leader of Alliance '90/The Greens, was preceded by	Reinhard Bütikofer and succeeded by Robert Habeck, a German writer and politician.
Evidence: Reinhard Bütikofer Robert Habeck Robert Habeck (born 2 September 1969 in Lübeck) is a German writer and politician of Alliance '90/The Greens and has been their leader since January 2018.