Turkish President Recep Tayyip Erdogan and his wife Emine Erdogan wave during a pre-election rally in Sarajevo, on May 20, 2018.  Recep Tayyip Erdogan holds today the only election rally outside Turkey ahead of the June 24 presidential and parliamentary election. Sarajevo was chosen for the rally after several European Union countries, including Germany, banned such rallies in the campaign for last year's referendum on a new system enhancing the powers of the Turkish presidency.  / AFP / OLIVER BUNIC
Turkish President Recep Tayyip Erdogan and his wife Emine Erdogan at a pre-election rally in Sarajevo, Bosnia, on May 20, 2018. Oliver Bunic / AFP

Erdogan's election travels expose challenge at home