The general secretary of Germany’s governing Social Democrats (SPD), Kevin Kühnert, announced his resignation on Monday, citing health issues. The 35-year-old politician shared his decision to step down in a letter to party members and the public, adding that he would also not run as a member of parliament in the national election next year. “For the foreseeable future, I need to use the energy that would be necessary for my office and an election campaign to recover,” Kühnert said, adding that the decision hurt him because he put his “heart and soul into [his] political work.” The SPD is the …