By Snezana Stanojevic Belgrade, Apr 4 (EFE).- Serbian president Aleksandar Vucic was re-elected in a landslide victory over the weekend but the populist leader must now strike a tricky balance between European Union aspirations and Kremlin bonhomie. Vucic, a former ultra-nationalist turned pro-EU figure in Serbian politics, secured an 58.5% of the vote share in …