Leader of German Social Democrats' youth wing could be Merkel's nemesis

FILE PHOTO: Kevin Kuehnert, the head of the SPD’s youth wing, speaks during an SPD party convention in Berlin, Germany, December 7, 2017. REUTERS/Fabrizio Bensch/File Photo

BERLIN (Reuters) - On the face of it, a fresh-faced, hoodie-wearing 28-year-old is an unlikely threat to the leader of Germany's Social Democrats (SPD), let alone to conservative Chancellor Angela Merkel.

Yet before an SPD vote on Sunday on whether to enter formal talks with Merkel, the leader of the party's Jusos youth wing has struck a chord with members with his campaign against a re-run of the "grand coalition" that has ruled Germany since 2013.