SPD parliamentary group leader Andrea Nahles told German radio on Friday that she would join the meeting along with SPD leader Martin Schulz...
SPD parliamentary group leader Andrea Nahles told German radio on Friday that she would join the meeting along with SPD leader Martin Schulz, who has called for a United States of Europe "by 2025".
The head of Merkel's Bavarian sister party, Horst Seehofer, will also attend the talks.
At a fractious party congress on Thursday, Schulz won members' approval for "open-ended" talks that could lead to either a new right-left "grand coalition", a Merkel minority government or, if negotiations fail, new elections.
Ten weeks after an inconclusive general election left German politics deadlocked, Schulz had pleaded with his party to give its blessing for such talks, promising to push key demands including improving social welfare and strengthening the European Union.
Schulz, the former president of the European Parliament, vowed to extract a high price if the SPD supports Merkel's bid to lead Europe's biggest economy for a fourth term from early 2018.
Nahles said the SPD would start the negotiations, which begin on Wednesday next week, in a constructive spirit.
"You don't go into talks with a giant rucksack full of red lines -- otherwise you can forget about negotiations."