The SPD, junior partners in Merkel's right-left national government, lost their ruling majority in the northwestern Lower Saxony region when a coalition deputy jumped ship.
"I consider it essential that the state parliament now dissolve and new elections take place as soon as possible in Lower Saxony," said Stephan Weil, premier of the state, which is home to auto giant Volkswagen.
Weil said he has no plans to resign.
Twesten had earlier announced her intention to join the conservative Christian Democrats (CDU) following a "long process of alienation" with her party.
The SPD-Greens coalition had governed the state since 2013 with a one-seat majority.
Lower Saxony was due in January to hold its state election, which is now likely this November. A poll this week saw the SPD trailing the CDU in the state by a 14-point margin.
On the national level, the SPD is trailing 18 points behind Merkel's CDU ahead of the September 24 election, according to a poll published Wednesday by independent opinion research firm Forsa.
Voters' view of Merkel as a safe pair of hands in a turbulent world and the rude health of the German economy are major challenges for SPD candidate Martin Schulz, a former European Parliament president.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
