“A Green candidacy for chancellor stands for a new understanding of political leadership,” Ms. Baerbock said. “Decisive and transparent, capable of learning and self-critical. Democracy thrives on change.”
Although the two leading candidates are the strongest contenders for the race, Germany’s finance minister, Olaf Scholz, 64, is also in the running for the Social Democrats. Traditionally the rivals of the Christian Democrats, with an emphasis on a strong safety net, the party has spent the past eight years relegated to being a junior partner in the chancellor’s governments.
But in the wake of the coronavirus crisis, which has seen the government break its balanced budget to pay for 1.3 trillion euros, or $1.6 trillion, in compensation for the lockdowns and vaccines, the party could gain support with a smart campaign focused on social justice and Mr. Scholz’ willingness to spend to keep people afloat.
With the conservatives polling just below 30 percent, the Greens hovering just above 20 percent, followed by the Social Democrats at around 18 percent, what seems clear is that whichever party wins the election will have to build a coalition to govern.
One idea has been that the Greens would become the junior partner in a conservative-led government that would be more environmentally focused than the coalitions of the conservatives and Social Democrats led by Ms. Merkel, but still heavily influenced by the Christian Democrats.
But even if the conservative bloc emerges as the strongest force, the Greens, as the second-strongest party, could try to build a progressive government together with the Social Democrats and one of the smaller parties, either the liberal Free Democrats or the Left party, forcing the conservatives into opposition.
All three leading parties have ruled out a coalition with the far-right Alternative for Germany, which wound up the biggest party in opposition after the Social Democrats joined the Christian Democrats in government in 2017.