From Der Spiegel:

In an upset victory, Germany’s center-left Social Democratic Party (SPD) and Greens won a pivotal state election in Lower Saxony on Sunday, ousting the incumbent conservative government with a one-seat advantage in the regional parliament… For Chancellor Angela Merkel, whose CDU party has now suffered defeats in the last 13 state elections, Sunday’s vote represents another dent in her chances at re-election in September.