Berlin (dpa) - Juso boss Kevin Kühnert has warned the SPD against a hasty exit from the grand coalition. Anyone leaving a coalition would give up some of the control, he told the Rheinische Post. This should be taken into account by the SPD delegates at the weekend's party when discussing their requirements for the coalition. Decisions should be thought through from the end. Kühnert was previously one of the leaders of the GroKo critics in the SPD. He applies at the party congress for the vice presidency.