Annalena Baerbock and Robert Habeck have led the party since early 2018. A pragmatic and harmonious duo, they have presided over a rise in the Greens' poll ratings. The Greens are in opposition nationally but sit in many of Germany's state governments.
The outcome of the Sept. 26 parliamentary election is unpredictable, in part because Merkel isn't seeking a fifth term after 16 years in power. Her bloc has yet to choose its candidate — two state governors, Armin Laschet and Markus Soeder, are expected to decide which of them runs by late May.
The Greens' general secretary, Michael Kellner, tweeted that his party has “a strong leadership duo” in Baerbock, 40, and Habeck, 51. He said that the party will announce on April 19 which of them will be its candidate for chancellor.
The decision will need endorsement from a party congress in June.
Baerbock, a lawmaker in the national parliament, lacks government experience. Habeck served for several years as the agriculture and environment minister of the northern state of Schleswig-Holstein.
The Greens last month unveiled a program that proposes speeding up Germany's exit from coal-fired power, raising carbon prices and massively increasing infrastructure spending.