<span style="color: #222222;">Turkish president Recep Tayyip Erdogan today called for the opposition's local election victory in Istanbul to be declared invalid and the vote re-run.  Erdogan said that there were irregularities and corruption.</span><br />'' <br />'' <span style="color: #222222;">He was speaking at a business leaders' meeting today. The electoral body is due to meet on Monday to examine a request by Erdogan's party to cancel the result of the March 31 local elections which the party lost in Istanbul. The main opposition candidate Ekrem Imamoglu won the mayoral race by a tight margin in that election.</span><br />''  <br />