The new acting general secretary of Germany’s governing Social Democrats, Matthias Miersch, wants his party to stick more closely to its own “priorities” again to make it stand out more from its coalition partners and the conservative opposition. Miersch was appointed the Social Democratic Party’s (SPD) acting general secretary on Monday, after his predecessor Kevin Kühnert resigned for health reasons. The SPD of Chancellor Olaf Scholz is in coalition with the Greens and the pro-business Free Democrats (FDP), but the centre-left alliance has been plagued by in-fighting and rumours that it is u…